I helped a friend adapt a shutter by making a threaded ring that attached the shutter to the front of the lens. It looked a bit hokey but it worked quite well. The aperture of the lens was still...
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I helped a friend adapt a shutter by making a threaded ring that attached the shutter to the front of the lens. It looked a bit hokey but it worked quite well. The aperture of the lens was still...
A quick way to locate pinhole (or other leak) is to put a small light inside the camera and bellows and look at the whole thing in the dark. Any light leaks are immediately obvious.
I recall...
I've found that household ammonia works well at removing dry adhesives from various glass items. The one optical element from an old test jig I dissassembled had epoxy on it and the epoxy just...
I wonder if the rep meant LF film in particular or all film in general? Just looking at local suppliers here in Vancouver Canada, I already see much less LF film available from anyone. Has anyone...
A once in a lifetime opportunity to capture a steam locomotive that was due to pass by about a mile away from home. Got the camera ready and checked out. Decided to use a rollback to capture a...
Are you using a densitometer to check the exposure, comparing the strips and prints side by side or just eyeballing the 8*10? If the latter, I would bet that viewing the strips by themselves or...
Another contributor to these pages describes a procedure using two mirrors in this document:
http://members.rpa.net/~choffman/darkmeasure.htm
I haven't made the mirror with the hole in it yet...
The kind I like is or was made in Israel under the Restem name. I also have the same style with a Soligor name. It's a black plastic two drawer gizmo that can be stacked and comes in various...
Here's a vicarious experience with a modern LF lens. I was going to buy a used Congo lens at one time because it was of recent manufacture with a modern shutter and was about 2/3 of the price of ...
Well, the Nikkor will have a newer shutter and multicoating but it may not be radically better than the f/6.3.
I have a 10" f/6.3 Comercial Ektar that I use with a medium format camera as a tele...
Cokin makes a gizmo that clamps on the outside of the lens using 3 plastic screws, but I found it to be a bit hokey so I didn't buy it.
If the 80 PQ has the bay 6 filter mount (same as the 80 mm...
I suggest a Leitz ball head. I picked one up at a swapmeet for $40 in beautiful condition because it was missing the top piece that attaches to the camera. It was perfect for me as I machined up...
Ahem - you can scratch my cunning theory a few posts back. I consulted the books last nite (after posting I'm afraid) and my memory of how tele lenses work was wrong. The only thing I had right ...
I have a cunning theory about this; perhaps Pete can back it up.
A telephoto lens in canonical form is a lens group with the desired focal length followed by another lens group to shorten the...
Three suggestions: - wear gloves to prevent depositing skin oils & other stuff on the emulsion. Wash them a few times to remove any lint. - find a place as dust free as possible. If you don't...
The posting about the longevity of photographers got me to thinking. If photographers tend to live longer (except for PJs that get killed in the the line of duty) because they don't do something...
FWIW, E Weston was a vegetarian. How devout, I don't know. I recall Ansel Adams jokingly attributing some of Weston's health problems to malnourishment in one of his books (Autobiography...
I'll throw my 2 bits in too (hopefully it makes sense; I think it does but it probably won't tomorrow).
Wisner's article is quite good and I think describes flat field lenses and their Petzval...
I machined up an adapter ring to fit a similar APO-Nikkor to an Ilex synchro (probably #5) shutter. The lens sits in front of the shutter and my friend has to adjust the aperture with the len's...
DJ has an excellent response to the question; I'd like to add and amplify on some of the points. So, FWIW here goes:
1.) I don't think the negative is the limiting factor in the contrast range...
Komura is quite a top notch lens manufacturer but is surely not in the same league as Nikon. They make broadcast quality TV camera lenses that are in the $$$ range as well as Komuranon enlarging ...
The Commercial Ektars are all threaded in inches. The 10" unit I have is about 2" dia ~ 52 mm. A 52 mm filter sort of works but you can really feel binding. I machined up an adapter ring and it...
I had a spare Condenser head so I installed the coldlight head in that and sealed things up. It's much easier to switch between condenser and cold light now. The non-variable condenser head is a ...
Just some thoughts:
As it turns out, what we call grain on the image isn't really grain. It's a grouping of a number silver halide cystals. As a result, the resolution can in fact be better...
The unit you have sounds like it's about the same size as an Omega Dx. If your condenser lenses are about 6.5-7" in dia and about 3" thick the design parameters will be about the same.
The...
I have this lens and it does _not_ have the standard metric thread. Kodak is a US company and it made all it's threads based on imperial. It it very close to 52 mm and will work but the pitch is ...
I echo the Romney lens cleaning solution. Equal parts Hydrogen peroxide & ammonia works well. It will remove anything organic. I cleaned an old Kodak lens and except for some slight patterns it...
You might try clear nail polish to fill in/build up the hole. It should have a similar index of refraction and can be removed with acetone (or nail polish cleaner).
In theory the defects should...
Here's a link to an article: http://graflex.org/articles/meridian/
If the article doesn't say so, it was built in the late 40's in New York for a dealer in two versions.
I have a 45b (the 2nd...
Commercial Ektars definitely came in barrels. I have a 10" CE that I adapted to a Rollei SL66. I don't know where it came from - some sort of strange Kodak camera I'm sure. I don't believe that...
Do you have the correct bulb in the light source? When I first got mine, it had a #240 which was much smaller and further away from the condensers. Illumination was good on the 135 but not so...
1.) Theoretically as a 14" lens it should cover the 13" diagonal of 8*10. Practically it may not because the shutter and lens barrel may cause vignetting.
2.) The net focal length of a compound...