That _is_ the normal operation. This is a leaf shutter lens for a reflex camera. So when it is on the RB and armed, the lens is open so you can see through your viewfinder. When you fire it, it...
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That _is_ the normal operation. This is a leaf shutter lens for a reflex camera. So when it is on the RB and armed, the lens is open so you can see through your viewfinder. When you fire it, it...
I have no idea of the f-value of loupes but I guess that the same DOF applies to them as to lenses?
I got out a more powerful loupe and indeed it looked as it is the plating. So I torn off all loose plating. After that I gave it a buffing with a fibre glass "eraser". Up to the next stage to get...
I'm taking apart the Compur shutter of my Devin camera. The lens is a Dogmar 5.5" f/4.5. The shutter is very hard to arm and the slow times are very erratic. Shutter and diaphragm are clean.
So I...
I'm glad I do not seem to be the only one thinking this is not a cheap camera but a very, very expensive sunshade....
- a scanner that sits between a flatbed and a drum that could take to 8x10
- centerfilters for wide angles
Could be I'm running into the limits of the scanner. But I don't think so. I'll get the light table out end of April (not at home the next week and weekends). As for large aperture... when used at...
Yes, I always try to be between f/16 and f/27. Maybe a bit arbitrary but on the other hand I'm mostly at a fair distance of the subject.
To me it all seems just as "not quite sharp".
It was...
Ok, thanks for your input guys. So I need to do some tests the coming days. I won't be able to develop the results for a week or so but I'll come back with what I found.
Well, I only took apart the GG of the Wista 45D as it was in need of a clean. And what I found was:
- lens
- fresnel with the ridges to the side of the lens
- metal spacer
- GG with the ground...
when I compare my photos with what I find here and elsewhere on the net, they never look as sharp. Sometimes I do get a sharp one. But I cannot attribute that to a lens of film. It isn't movement,...
Still at least 5475 days to go. That is if they don't change the rules and I make it. Honestly, I'm not counting on either of that. Taking photos when I can using the camera I feel that moment. Going...
4 x 5: Wista 45N, 45D and a pinhole camera
3-1/4 x 4-1/4: National Photocolor 3T44
6.5 x 9 : Devin Tricolor (but that's MF I guess)
I do have some 5x7 holders around but no camera to put them in...
Problem is that ULF film is more expensive than the cameras and lenses...
If you don't absolutely want the "big names" because "they are soo much better" you can get set up for a reasonable cost. But if you want to pay for a brand name on your gear, go ahead.
Great job! I'm interested in those dichroic splitters. That must be a great step up from beamsplitters and color filters.
National Photocolour can stll provide new beamsplitters for their cameras....
They are holiday homes in De Haan (Belgium).
One with the Mamiya Press 65mm. I repaired the light leak around the button to release the lens and also replaced the seals of the back.
https://quirinus.one/forum_foto/6x9_018.jpg
Foma 200, 10...
I have taken out 2 sheared brass bolts (M1.6 JIS) by drilling very carefully in them with a 0.5mm drill in a hand holder. Takes some time but when I was through (about 3mm deep) I inderted a square...
Well, I got some 0.1mm stainless steel shim. At the moment the idea is to etch them using the old (rusted) blades as a mask.
My pleasure, I'm happy it served someone. Here it is: https://www.largeformatphotography.info/forum/showthread.php?162077-taking-apart-and-cleaning-an-Ilex-4-ACME-shutter&highlight=ilex+acme
Keep...
If I compare that to what I found in my Ilex 4 Acme, then that spring sits differently:
http://quirinus.one/forum_foto/3t44/ilex/ilex_4_acme_006.jpg
The rest if taking it apart is also on the...
Would making it yourself be an option? No idea if you can buy an optical blank. But I once found in the library at uni a book about lab practices and grinding your own lenses and mirrors was part of...
"Liquid optics"? Nothing new, Herschel used it in one of his telescopes. 2 halves filled with liquid in between. Different liquids give different indexes. But you can go large without needing massive...
Just 2 questions about this:
- do you store the film holders with the darkslides in? I sometimes think it might be better for the velvet that the dark slide is out. But I never seen/read this so...
#3 says fungus to me. Might be the photo and how it is taken. The black things are likely paint flakes.
If it is as the #4 ACME I took apart, then you just need to "wiggle" the next piece out of the black "cup". It is just very tight fitted together.
New parts shouldn't that hard for an Ilex....
Using a Jobo 2520 + 2509n I never messed up developping unless I poured in the wrong solution or messed up the dilution. And with rotation I can develop 6 of them with 270ml. Try to find a lot of 4x5...
Do you mean ten keepers or just ten shots?
Ah is it? Sorry, when I read measurements without units I assume SI.
I looked at those and they all come from the US or further away. Let's take a look at just the first on the list:
- 100 sheets 10x12 (approx 4x5) €39.61
- postage €45.63
- taxes and duties, 30% on...
It might be easier to find another shutter in the US but here in the EU it isn't that easy. And getting one mostly involve getting a complete lens. I do have a good set of lens elements. So it looks...
Right, I'm trying to get a synchro-compur #00 back to work. This was a bad buy on a fair. Lens was clear and neat, shutter locked (nothing rare) and low priced. Ok, so the shutter had been wet, rust...
I haven't followed this from the beginning or read all the related threads. But when you have formulas that describe a design, you can use them in several ways.
Mostly this seems to be interpreted...
Like many others I work in multiples of 6 sheets. So mostly 6 holders. All the same film or 2 types.
I do tend to buy boxes of 25 sheets and then load the complete box in holders, mark the holder...
+1! You really need a mill with a flycutter or a lathe.
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Or far more patience than I have.
This works until you meet a JIS thread. Which is metric in diameter and pitch but not in thread form. I haven't found a source for small JIS bolts so far.
They very likely sell you a new camera because they have no idea, let alone tools and pieces to repair a camera that is older than they are.
Same here. According to firefox (on linux) I have to update my clock of the pc. I don't think that NTP works that way :D At least Firefox let me continue, Vivaldi (my default browser) or the Android...
"freier Öffnung" is the "free opening", that which is free to pass light. So apperture is correct I'd say.
"verhält" in this case is as in a mathematical "ratio/proportion of 2 to 3".