Thanks for the info. I agree that for optimal registration each lens should be measured individually.
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Thanks for the info. I agree that for optimal registration each lens should be measured individually.
I was recently searching the web for some lens info and noticed on one page that I can no longer find, that the lens table in question had flange focal distances quoted for Copal and Prontor shutters...
Thanks for that Dan. Yes I had noted the somewhat confusing marketing names. The reason I asked the original question is that I wanted to purchase a Tessar formula Paragon and not get something else...
Thanks for that Louis. I have been looking through the eBay adds to see if I could get some other info and I have noticed that there are coated versions of the non Series S and Series S lenses with...
The links are a plus but don't help.
There is a "Series S" mentioned. I had already found that. It is not an f/4.5 Tessar but an f/8 Symmetrical as I indicated in the OP.
"I have looked and...
Hi,
If anyone can help, I would like to know if there is any difference in the optical design of f/4.5 "Paragon Anastigmat" and "Paragon Anastigmat Series S" lenses. I am thinking specifically in...
I was very pleasantly surprised when I made a request for info to Barbara Lowry at Cook Optics. I got an almost immediate reply and soon after she sent some data that she has been collating.
It...
I had heard that requests for info had been an apologetic refusal. Time is money and I guess they have other objectives (!). We will find out as I am mailing them for some more detailed info in the...
Thanks for that info and the photo Will. I see you have your XIV in a Compound 4. I had calculated that that would probably do and bought one on the strength of my measurements. So I will contact...
I have recently acquired a pair of cells for a f/6.3 330mm Cooke Series XIV lens and am trying to get more info on it. VM has little to say other than it is something between a portrait and process...
Hi,
For anyone that has done this I would be interested in their solution. Note that it is a Hermagis barrel that I have, not a Berthiot. The principle issue is that from photos I have seen, the...
I counted the thread pitch and as far as my tools (no imperial ruler) are able the G seems to be synonymous with TPI. Why they gauge manufacturer didn't just put TPI defeats me.
Thanks for that.
I have just acquired a Cooke Series XV in a barrel mount. Unfortunately I do not have the mount flange. I have been trying to measure the mount thread and also the element threads to see if they...
Good idea. I have been using card frames or guesstimation and still will when out and about with the cameras, but I don't always have them with me, whereas the pesky phone seems to be pretty much...
Thanks guys. I had seen Ole's posts but the tube length specifications aren't clear from those. My guess was about right then.
There is some nice info on Schneider's vintage lenses on their web site. ex:
<http://www.schneideroptics.com/info/vintage_lens_data/large_format_lenses/tele-arton/data/5.5-240mm.htm>
However I am...
Thanks for your input guys, Much appreciated. I will update here with progress.
I saw a doc on the sinar.ch pages giving that info, but it seems that it does not concord with my lenses (maybe older versions). I have a 60mm and 135mm. Both of these DB are shown as shutter size 0,...
The F-Line 6x9 front standard only takes 110 square boards, so I would need to get a 4x5 front standard and a couple of rolls of gaffer tape to adapt my Copal. I have a spare, but doing it would sort...
Hi,
I have a couple of Sinaron digital lenses in Sinar DB boards that I would like to be able to use on an Arca Swiss 6x9 so I need to move them to shutters. However, they don't fit directly to...
The shutter shown in item for the spacer does not look like an auto aperture shutter.
At least it is not like mine. My auto aperture shutter has a coupling pin which is proud of the shutter face...
that is a real cannon. possibly get the rear element away from the standard with a top hat. Have a look at item 200272531306 on fleabay to get an idea. It might be worth measuring your rear element...
I don't have this camera, but it appears from the doc at http://www.galerie-photo.com/catalogue_wista.pdf , that it has plenty of back tilt and rise in the fron standard. try rise/back tilt. It...
For mine, there was nothing more complicated than unscrewing the lens cells from the shutter and screwing them in to the db board. That said, I have not checked the cell spacing :( before/after doing...
pinholes.
Qualifications like excellent/faire are purely subjective and mean what the user wants them too, but "well used but works fine" cannot be correct as one of its designed features of accepting screw in...
see http://www.cameraeccentric.com/html/info/schneider_7.html for the Schneider brochure. Plenty of technical info. Only use of the single rear element is indicated.
nice. what film format is that on? I should imagine if the lens was designed for 35mm cinema stock that coverage at infinity would not be very large.
You would lose some of the movement capability. However, I was wondering if there might not be another disadvantage with large image circles. For instance, using a long process lense on a 4x5. There...
Hi Thierry,
I am not sure that a formula is possible due to differing lens formulas. As pointed out previously, the image circle (attenuated by any falloff) will be the limting factor.
Lenses...
Yes, it's for orienting the shutter and can be safely removed. I could not find any doc on the Copal site, but it is mentioned in the archives here ( use lock pin for a key). SKgrimes also has a note...
http://www.allenrumme.com/lensdb/General%20Use.html indicates a Plasmat design uncoated, covering 4x5.
Vic,
I have a model P and just had a check with mine and found no issue. After focusing with a loupe,focusing remained spot on with the reflex on, magnifiers up or down, or after pivoting of the...
I suggest Tominon 75mm/105mm . About 30-50 dollars in a copal shutter.
hmm. By DBM are you talking about the Sinar boards? These are auto with a manual override, the auto aperture feature being actioned by either a red button or a sort of latch. In order for them to...
I also once sent data to the FBI site concerning an internet scam but heard abolutely nothing since. I presume that if it doesn't fit some high level profile they don't give a ****. I should have...
You could post a mail from the sites contact page to get them to remove the ad. They might be able to take further action if they can localise the scammer.
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I...
Take a ruler to a supermarket. I was needing a number of 77mm caps and found a mustard container had what I needed. A plastic cover of exactly the OD of the lenses. On top of that I get the mustard...
I don't have a Toyo, but on my sinar P I prefer the bag as movements are easier.
I think you will find the Chines products good quality and good value for money, however , if you can wait a couple...