The Compound 5: a big shutter for big barrel lenses

June 28, 2015  •  3 Comments

42 Artar in Compound 5 Shutter42" Artar in Compound 5 ShutterA great option for mounting large barrel lenses for ULF photography

The Compound 5 shutter is a great alternative for shutter mounting large barrel lenses for ULF photography. It has an appreciably larger aperture and cell mount than the Copal 3 or Ilex 5 alternatives - so it can avoid vignetting. The Compound shutter was developed in Germany in 1905 and stayed in production until the 1970s. It was prized for its reliability and unlike modern shutters uses a pneumatic cylinder to regular the exposure time. Care must be taken when undertaking a CLA of a Compound shutter since it has delicate workings which do not take to the typical cleaning approaches used with clockwork designs. SK Grimes has a list of lenses and suggested shutters for mounting them on which is a good place to start when considering barrel mounting. Strangely this list doesn't mention the Compound 5 which is certainly a better option for a 42" Artar for example.

 

Large Shutter Options for ULF
Shutter Aperture Lens Cell Mount Shutter to Board Mount Max Speed
Copal 3 45mm 58mm M 60mm x .75 1/125 second
Alphax 5 58mm 73.8mm 3.117 inches - 30 t.p.i. 1/50 second
Ilex 5 63mm 75mm 3.225 inches - 30 t.p.i. 1/50 second
Compound 5 64.5mm 82.8mm M 90mm x1 1/50 second
Sinar Copal 76.2 mm (3 inches) Mount rear of barrel to Sinar Board Part of system 1/60 second
Packard 88.9mm (3.5 inches) up to 203.2mm (8 inches) custom Custom front or rear of lens Custom 1/25 second

 

How to use the Compound Shutter

The Compound 5 shutter is similar but different to the modern Copal shutter. There is a Wheel (1) for setting the exposure time which goes from 1 second to 1/50 second. There is a Mode Setting (2) to switch between "T", "B" and "M" or manual (using the exposure time wheel). The is a Shutter Cock (3) for cocking the shutter - but this is only to be used in the "M" setting. Using the shutter cock when in "T" or "B" modes may damage the shutter. There is an Aperture Setting (4) ring for setting the f-stop. There is a manual Shutter Trigger (5) and a Cable Release opening (6) for taking the exposure. Apparently pneumatic shutters are more accurate if you pause briefly between cocking the shutter and taking the exposure to allow the cylinder pressure to equalize with the outside pressure. Note: The image below is of the Compound 4 shutter which is identical in all respects besides its size and fastest exposure time.

Compound Shutter LayoutCompound Shutter Layout(1) Time, (2) Mode Setting, (3) Shutter Cock, (4) Aperture Setting, (5) Manual Trigger, and (6) Cable Release

 

Useful resources:

http://www.skgrimes.com/library/used-obsolete-discontinued-shutters/compound

http://www.lensn2shutter.com/shutters.html


14x17" ULF Lens Recommendations

February 13, 2015  •  79 Comments

Holy TrinityFrom left: Fujinon C 600mm f11.5, Nikor M 450 f9, G-Claron 355mm f9

Over the past year, I've been building a lens collection to use with my new Chamonix 14x17 view camera. Normal (being 560mm on this format) and wider lenses are relatively easy to find. But it's at the longer end of the spectrum that the choices become more varied and its harder to make a decision. So I started by buying what I call the ULF "Holy Trinity" of modern shuttered lenses that is just about in the arsenal of every serious ULF user shooting sizes above 11x14: G-Claron 355mm f9, Nikkor M 450mm f9, and Fujinon C 600 f11.5. They are relatively lightweight, small enough to fit on a Linhof Technica lensboard, have manageable filter sizes, and cast usable image circles far over what is quoted by their manufacturers. Of the three, only the Fujinon C 600mm is hard to find these days.

It's worth noting that many of these recommendations would work just as well for the 12x20 format with its 593mm image circle requirement being just a little more than the 560mm needed for 14x17.

The ULF "Holy Trinity" Lenses

Lens

Focal Length (mm)

Max Aperture

Image Circle (mm)

Shutter

Filter Size (mm)

Wieght (g)

Market Price

G-Claron

355

f9

444

Copal 3

77

855

$550-700

Nikkor-M

450

f9

440

Copal 3

67

640

$800-1000

Fujinon-C

600

f11.5

620

Copal 3

67

575

$1200-1600

 

Now if your budget won't allow for the "Holy Trinity" there is a "Second String" worth considering. The added bonus is these lenses are a little faster but they are heavier, need to be on Sinar or larger lensboards, have bigger filter rings and usually come in older Compound 5 or Ilex 5 shutters. The Symmar Convertible is particularly interesting since it can do double duty at 360mm and 620mm, potentially making it the only lens you will ever need - assuming your front standard can take almost 2kg or 4.2lbs of weight. The B&L lens is somewhat hard to find pre mounted in a shutter but more common as a barrel. Goerz Red Dot Artar 24", Apo-Nikkor 600mm or 610mm and Apo-Ronar 600mm are all pretty much interchangeable. I would pick up the first one you find in an Ilex 5 or Copal 3 shutter.

 

The "Second String" Lenses

Lens

Focal Length (mm)

Max Aperture

Image Circle (mm)

Shutter

Barrel Mount

Wieght (g)

Market Price

Symmar Convertible

360/620

f5.6/12

500

Compound 4

 

1,910

$250-350

B&L 14x17 Series IIB

489

f6.3

14x17" @ f6.3

20x24" @ f32

Compound 5

 

3,130

$600

21 1/4" Kodak Copying Ektanon

540

f11

559

Barrel

3 15/16"

730

$200

Apo-Ronar-CL

600

f9

534

14x17" @ 1:10)

(24x30" @ 1:1)

Ilex 5

M90x1

1,563

$600-800

Apo-Ronar-CL

600

f11

 

Ilex 5

 

1,547

$600-800

Apo Nikkor

600

f9

 

Ilex 5

 

775

$600-800

Apo Nikkor

610

f9

518

(1,030mm @ 1:1)

Ilex 5

M110x1

1,450

$600-800

Goerz Red Dot Artar 24"

610

f11

(12x15@ 1:10)

(24x28" @ 1:1)

Ilex 5 / Copal 3*

 

 

$600-800

* Misses maximum aperture by 1/3 stop

Now to get a real jump up from 600mm to make a difference in perspective I would suggest you want to go up to 30" or 760mm. Personally I looked for more modern lenses that could be found in a shutter or at least mounted in one. Many process lenses can be shutter mounted and made to work. Sometimes this results in a small loss of speed of 1-2 stops as the shutter constricts the aperture but its not usually material. Older process lenses can be made in brass and be extraordinarily heavy. Likewise, their sheer bulk can make it hard to mount on a smaller lensboard and fit on a 'modern' shutter like a Copal #3 or more likely an Ilex #5. So in practical terms if the lens can be shutter mounted it will fit on a Sinar board of 5.25" square or larger. Once you have found your barrel lens, you will need to buy a shutter, a flange and a lensboard.

Shutters are often easier to buy attached to a lens. The 375mm f6.3 Ilex-Calumet Caltar is a particularly unloved lens that comes in an Ilex #5. Remember that the Ilex 5 came in several flavors, starting from the left in the image below: Kodak branded (avoid due to smaller aperture and mount), Black (avoid, oldest version), Silver Older (look for this one), Silver Newer (this is the best). Then there is one more kind, the "Syncro Electronic" that can only be fired with an electronic voltage and is basically useless otherwise.

Left to right: Kodak Ilex#5, Black Ilex#5, Older Silver Ilex#5, Newer Silver Ilex#5 Ilex5Ilex #% Shutter VariationsLeft to right: Kodak Ilex#5, Black Ilex#5, Older Silver Ilex#5, Newer Silver Ilex#5

 

Similarly the Copal 3 comes in two sizes the 3 and the smaller 3S.  Avoid the 3S as it has a smaller maximum aperture size. The regular Copal 3 comes in three versions starting oldest first: small tooth rim in silver, wider smoother tooth rim in silver, and finally black. If possible go for the black version or second best silver with wider smoother tooth rim, avoid the the other two versions.

Front left to right: Copal 3S, Copal 3 Silver Small Teeth, Copal 3 Silver Big Smooth Teeth, Copal 3 Black

CopalCopal 3 Shutter VariationsFront left to right: Copal 3S, Copal3 Silver Small TeethSilver Big Teeth (S), Copal 3 (C) Copal 3 Big Teeth Black (B)

 

Then you need to get the barrel mounted to the shutter and lensboard by an machinist like SK Grimes which usually charges around $350-450 for the honor. At the same time as you have the mounting done, I recommend that you ask your machinist to put some threads on the lens front element (if there are none) and make you a new front lens cap. The reason being that most process lenses don't come with filter threads and it can be hard to find a good fitting cap for your custom set-up. Often you have the option of a small range of filter sizes - say about 5mm plus or minus. So if possible try and standardize on some favorite sizes - like 67mm, 77mm, 95mm or 105mm.

Left to right: Symmar Convertible 360/620 f5.6/12 in Compound 4, 30" Red Dot Artar f12 in Copal 3, and 35" Red Dot Artar f12 in Ilex #5

BannerLensVariety of shuttered ULF lensesLeft to right: Symmar Convertible 360/620 f5.6/12 in Compound 5, 30" Red Dot Artar f12 in Copal 3, and 35" Red Dot Artar f12 in Ilex #5

 

The most common lenses to shutter mount are the APO-Nikkor, Rodenstock Ronars and Goerz Red Dot Artars. The APO-Nikkors get huge after 760mm and can't reasonable be shutter mounted beyond that focal length. Rodenstock makes the regular APO-Ronar and a compact APO-Ronar-CL line of process lenses. After 760mm the most sensible lenses to choose are the Goerz Red Dot Artars but you really want an aluminum version from after the late 1960s not an older brass one because of the weight penalty. The weight penalty can be offset through shutter mounting since much of the brass barrel is discarded in the process. The Carl Ziess / Doctar Apo Germinar lenses in 750mm and 1000mm come in barrels and a native Copal 3 mount.  They are some of the most modern processes lenses available but they are apparently hard to cut out of the barrel and shutter mount on an Ilex #5. Then there is of course the Schneider 1100mm f14 Fine Art XXL which even if you had the $3-5k to buy it is hard to find. Many of the longer, and some of the shorter, lenses on this list are over 3 Kg and would put a real strain on most field cameras. So while they could be feasible mounted on a shutter you are probably better off with one of the sub-3 Kg options.

The "Shutter-Mountable Long Shots"

Lens

Focal Length (mm)

Max Aperture

Image Circle (mm) at Infinity

Shutter

Barrel Mount (mm)

Filter Size (mm)

Weight (g)

Market Price

APO Germinar

750

f9

715

(1,270 @ 1:1)

Ilex 5

M105x1

 

3,900

 

APO Germinar

750

f14.5

795

(1,230 @ 1:1)

Copal 3 (Native Mount)

M95x1

 

3,900+

 

APO Nikkor

760

f11

583

(1,170mm @ 1:1)

Ilex 5

M110x1

95mm x 1

1,360

$500 +Shutter and Mounting

APO-Ronar-CL

760

f14

500

Ilex 5

M90x1

67mm

1,190

$400 +Shutter and Mounting

Goerz RD Artar 30"

762

f12.5

660

(16x20 @ 1:10)

(1,290 @ 1:1)

Ilex 5/Copal 3*

 

67mm (custom filter thread)

1,300

$600 +Shutter and Mounting

Apo-Ronar-CL

800

f9

 

Ilex 5*

 

 

3,600

 

Goerz RD Artar 35"

889

f12.5

773

(18x22" @ 1:10)

(1,510 @ 1:1)

Ilex 5 / Copal 3*

 

95mm (custom filter thread)

1,640

$1,500 +Shutter and Mounting

Apo-Ronar-CL

890

f14

 

 

 

 

 

 

APO Germinar

1,000

f12

895mm

(1,590 @ 1:1)

Ilex 5

M105x1

 

4,500

$2,000

APO Germinar

1,000

f19.5

995mm

(1,535 @ 1:1)

Copal 3 (Native Mount)

M95x1

 

4,500+

 

Apo-Ronar-CL

1,000

f14

 

 

 

 

2,500

 

Apo-Ronar-CL

1,000

f16

 

Ilex 5*

M115x1

 

5,000

 

Goerz RD Artar 42"

1,067

f14

(22x27" @ 1:10)

(1,810 @ 1:1)

Ilex 5* / Compound 5 / Alpha 5 / Betax 5

 

95mm (custom filter thread)

1,815

$1,750 +Shutter and Mounting

Apo-Ronar-CL

1,070

f14

1,000mm + (confirmed by an owner)

Ilex 5* / Compound 5 / Alpha 5 / Betax 5

M120x1

90mm (front and back)

2,495

 

Schneider Fine Art XXL

1,100

f22 (f14 in barrel)

900

Copal 3 (Native Mount)

 

105mm

2,400

$3,000-5,000

Goerz RD Artar 47.5"

1,194

f15

(25x32" @ 1:10)

(2,050 @ 1:1)

Ilex 5* / Compound 5 / Alpha 5 / Betax 5

 

 

 

$2,000 +Shutter and Mounting

APO-Ronar-CL

1200

f14

(40x50" @ 1:1)

 

M100x1

 

 

 

APO-Ronar-CL

1200

f16

(40x50" @ 1:1)

 

M135x1

 

6,577

 

* Will lose 1 or more stops of speed when mounted. For example, a 35" Artar goes from max aperture f12.5 to f19 in a Copal 3.

Now if you are content to use a barrel lens without a shutter or have a Packard shutter of the right size lying around then you might want to consider the lenses in the "Super Long / Heavy / Big Barrels" list below. Most of the lenses are too big to mount on a Sinar board and weigh so much that they would put a real strain on just about any front standard, but hey, with lenses this size and the bellows requirements this long you are probably thinking of mounting it on the side or end of a delivery truck! Right?

The "Super Long / Heavy / Big Barrels"

Lens

Focal Length (mm)

Max Aperture

Image Circle (mm) at Infinity

Image Circle (mm) at 1:1

Barrel Mount / thread (mm)

Filter Size (mm)

Weight (g)

Market Price

Apo-Nikkor

890

f11

20x24"

1,360

M162x1.5

 

3,600

 

Apo-Saphir

900

f10

655mm

 

M140x1.5

 

4,000

 

Apo-Nikkor

1210

f12.5

 

1,750

M162x1.5

 

3,800

$1,850

Apo-Saphir

1210

f12.5

 

1,680

 

 

 

 

Apo-Nikkor

1776

f14

 

2,310

M213x1.5

 

6,430

 

Goerz RD Artar 70"

1778

f16

(36x45" @ 1:10)

3,020 @ 1:1

 

 

 

 

APO-Ronar-CL

1800

f16

 

2,500mm @ 1:1

M208

 

7,700

 

Cheaper than the more modern process lenses list above, would be to use an old process lens from one of the former major lens makers. Allen Rumme's site has an extensive list of process lenses of which a bunch would work for 14x17 format. In particular look at the Ross Apo Process (coated) and Apochromat Xpres (coated) lenses from 21" to 48" and the Taylor Hobson Cooke Series IX Apochromatic (coated), Cooke Series Vb Process, and Cooke Process lenses also from 21" to 48". I wouldn't consider mounting these lenses on a shutter but simply using them in a barrel stopped way down to get long exposure times you can manually execute. 

By necessity this series of tables is incomplete in places. I don't own many of these lens myself. If you have any of the missing data please leave a comment below. It will be much appreciated and a big help to the 14x17" ULF community


Arista UV Lightsource 20x24 review

February 10, 2015  •  3 Comments

AristaUVAristaUV Ever since I have been getting into alternative processes it's been clear that I needed a UV source of my own. It seems there are a few different options, from cheap and cheerful to quite expensive:

  • Use the Sun - it's free but not particularly reliable in some places (like foggy San Francisco) or replicable for precise timing
  • Buy a Mercury vapor or metal halide bulb - cheap but you have to fashion some sort of frame to hold the bulb and this gets hot, coverage can be uneven
  • Make you own UV unit with tanning bulbs - not too hard to do, there are plenty of directions on the internet.
  • Make your own UV unit with UV LEDs - quite easy to do, here are some directions.
  • Buy a new purpose built UV unit made with UV bulbs - vary in price but since they are purpose built tend to work well.
  • Buy a used plate burner or graphic arts printer - can be hard to find, expensive and they are large units to install.

You can read an exhaustive review of the options here at the Unblinking Eye.

I decided that I didn't want the hassle of making my own unit and so searched around for something reasonable and robust. Fortunately, I found the Arista UV Lightsources available from Freestyle. It comes in two sizes 20x24 for $699 and 30x36 for $1,999. They are pizza oven style boxes made of aluminum with a front flap that lifts up to accept the contact printing frame. They use relatively little energy and with such a large heavy metal box, heat is well dissipated even after the unit has been on for several hours. My unit, the smaller of the two, appears to power up nice and quickly. The unit comes with a metal sheet that covers the bottom but once you put the box on a flat surface I don't think its really worth putting in place. I doubt this will cause any problems but I wouldn't place the unit on a nice wooden table! There is a 3/4" lip of metal around the bottom on all sides but the front. This could get in the way with larger 16x20 contact frames.

The internal dimensions of the box are 25" wide, 20 1/4" deep and 2 1/2" tall. You could actually use a frame that was 3 1/2" thick if it were 20x23" maximum external dimensions. My 23 3/4 by 19 3/4" frame (external dimension of the 16x20") fits but the pizza oven flap doesn't quite close completely. That's fine. I'm not planning on leaving my fingers around the opening to get a tan. I've had nothing but even exposures with both cyanotype and platinum prints.

Alternative UV printing boxes that are available tend to be made of wood and are a little pricier. I'm sure they work since they are sold by Bostick & Sullivan but I suspect that the Arista units are better value for money and appear to be more robust in design.

 


My film choices

February 05, 2015  •  3 Comments

FilmWideFilmWide Its been a little over three years since I started shooting film cameras again and working my way up the food chain from from medium format, to large format and now ultra large format. Sadly during that time some film types have been discontinued and my choices have become even more limited. What I would like to share in this post is my decision making process for deciding which films I would concentrate on for the future based on equipment, shooting style, workflow, preferred output sizes and judgement on which companies were likely to stay in the game. But ultimately if you love one film, I say buy lots of it and drop it in a freezer!

Medium Format Films (120)

I have a number of cameras providing 6x6, 6x7, 6x9, 6x12 and 6x17 formats. Regardless of the size of the negative, with 6x17 really approaching large format proportions, I've found that a traditional black and white film, even fine grained like Fuji Acros just doesn't have the detail I need to push my images up to 16x20". This is true even though I use a dedicated Medium Format scanner prior to digital post processing. Your mileage may vary especially if you are optically enlarging for silver gelatin prints. So much as I like to home develop my film, I've settle on using more modern dye based films for medium format. Since dyes don't have the same granular resolution limitations of traditional black and white films I find I can enlarge them much more and not suffer any consequences. Also film development is standardized to C41 (color negative) and E6 (slide transparency) so you get a more consistent result with a good lab. Film speed also becomes an issue when hand holding my smaller MF cameras or using them in poor light. So in the end the films I've settled on are the following:

Ilford XP2 Super - Data sheet - At ISO 400, this film has the speed for most hand held daylight photography. Unique among films developed with the C41 process, it is not a color negative film but rather a black & white negative film - so there is no added step to converting your images to black & white and you can freely use traditional black & white filters like #16 Yellow-Orange for contrast. Also unique among C41 films it has no orange color to interfere with scanning or optical enlarging, perhaps a faint magenta cast instead. Ilford is also the one film company right sized for the current market and is likely to be around for the long term. I only wish they made this film in sheets.

Fuji Velvia 50 - Data sheet - A slow, fine grained, highly color saturated color reversal or slide film. Wonderful for landscapes giving you amped up color. Potentially terrible for skin tones and anything that people "know" the color of! Processed using E6, it's getting harder and harder to find places to develop it. Fortunately for me, I live in San Francisco where a number of small outfits still provide the service. No hand holding the camera with this film, it's tripods and careful compositions. Dynamic range is somewhat limited and shadows can block up and get cool so you might need warming filters. Reciprocity failure is a worry for long exposures and needs to be well compensated for. On the upside, there is no messy conversion of a negative to a positive. What you see is what you get, so scanning the image is a delight. Looking at the slides on a light table is a complete rush.

Kodak Ektar 100 - Data sheet - Really the color negative counterpart to Velvia 50. Slow, fine grained but not as vivid. Again reciprocity failure is an issue for exposures more than a few seconds. With the likely discontinuation of Velvia 50 in the coming years, Ektar 100 may be our only choice for super high quality color film for landscapes.

Kodak Portra 160 / 400 / 800 - Data sheet 160 / 400 - For more accurate colors for portraiture and faster speed this series of films offers many advantages. Again since they are C41 films they are easy to get processed. Fuji offers similar products in ISO 160 and 400 but not 800. But on the whole, I think that Kodak's film business, now owned by a spin off called Kodak Alaris, is likely to continue for a good number of years, while Fuji seems quite happy to discontinue emulsions abruptly and with little communication to its customers. On the other hand, Kodak's film division will suffer as the movie industry completes it's transition to digital.

Large Format Films (4x5" and 8x10")

For sheet film, the resolution limitations of black & white film really don't matter with such enormous negatives. Enlarging a 4x5" or 8x10" image up four or five times is certainly feasible both digitally or the old fashioned analog way. Contact printing may lead you to ever larger film sizes but if you want to do post processing on a computer you are basically limited to 8x10 and an Epson V750, or sending your work out for a profession drum scan. One alternative to consider is generating digital negatives from the analog original to get a larger size for contact printing and alternative processes. Many of the same films I use for Medium Format are available in Large Format and they are also worth using in the right circumstances.

Ilford FP4+ - Data Sheet - For 4x5" and larger it really doesn't matter that this film is a traditional film with medium grain size as there is plenty of detail. The advantage of FP4+ is that it is very forgiving to over exposure unlike more fine grained options like Delta 100 or Acros 100. Receprocity failure starts to set in at 1/2 second, which can be a serious constraint with Large Format. You can develop this film in just about anything. Ilford offers its own chemicals. I personally am partial to XTOL, that brings out the best in just about any black & white film, has low toxicity, and keeps well in sealed bottles once mixed. Or Pyrocat-HD if you want to take on an alternative process or two.

Acros 100 - Data Sheet - Still available in 4x5 in the US, and in 8x10 but only from Japan, this is a modern fine grained film with more unforgiving exposure latitude but excellent reciprocity characteristics. Fuji says no need to make any adjustments for reciprocity until 120 seconds which is a lot better than 1/2 second! I'm not sure how long Fuji will keep offering this film. It's definitely something to salt away in the deep freeze if you like photographing gloomy redwood forests.

Kodak Ektar 100 - Data sheet - As above. Great for landscapes.

Fuji Velvia 100 - Data sheet - I would say Velvia 50 for 8x10 but at the moment its getting very hard to buy and only from Japan. Clearly Fuji is pushing Velvia 100 as the alternative. Not quite as saturated but still an excellent performer for landscapes.

Kodak Portra 160 / 400 - Data sheet 160 / 400 - As above, but ISO 800 is not available in sheet film sizes. Great for portraits and skin tones.

Ultra Large Format Films (14x17")

When you get up to Ultra Large Format, in other words anything above 8x10" the options really start to narrow. No color film and precious few black & white options exist and those that do are very pricey ($16-20/sheet). Then there are orthochromatic X-ray fiims for medical uses that are remarkable cheap but prone to scratching and very high contrast.

Ilford FP4+ - Data Sheet - Quite expensive at $20 a sheet in this size. Available from relatively few outlets during the Ilford special order window which in 2014 was between May 6 and June 27. With negatives this size the grain is basically invisible, especially when contact printing - and I haven't seen too many 14x17 enlargers out there. The digital route is always a possibility if you can find someone who can scan your negative. I've got a Screen Cezanne flatbed to get up and running that can scan negatives this size.

Adox CHS 100 II - Data Sheet - If you look at the data sheet you can see a slight dip in sensitivity between blue and green which some people like since it separates and differentiates between lips/face, clouds/sky, and water/land. The film is on a PET base and I have seen very slight effect of light leakage onto the bottom edge of the film. It's not enough to be a real issue and hasn't bled into the image area itself. This is the cheapest 'real' film available in ULF. In 14x17 you can get 10 sheets for €100 from Fotoimpex in Germany. They tend to have cheaper prices even with shipping than the US alternative which is Freestyle where it would probably be a special order.

Kodak Ektascan B/RA - A medium speed, single coated, tabular grain, orthochromatic medical x-ray film for photography of cathode-ray (CRT) tubes. It is single sided coated on a blue, 7-mil blue-tinted polyester with anti-halation protection. The film base is really thick and sturdy! Read my review on how I use it and where to buy it. Costs are in the $1.5/sheet range (for a 500 sheet pack) which makes it possible to really burn film in a ULF camera and since the film gives high contrast results many people prefer it for alternative processes. But the truth is that with the cost of film holders, time and difficulties to set up the camera and compose the image, and the time to process the film its unlikely anyone would get through very much.

Wet plate - make your own photosensitive surface and no longer worry about film availability!

 

 

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