Search found 2817 matches

by ray_parkhurst
Tue Feb 01, 2011 8:38 am
Forum: Equipment Discussions
Topic: Printing-Nikkor Adapter
Replies: 106
Views: 30616

Check out the StackShot rail by Cognisys . It's an automated rail with about 4 inches of travel and enough resolution even for use with microscope objectives (see 40X with a StackShot rail ). --Rik Wow, I have seen some of the discussion about StackShot but hadn't looked further. Looks perfect, tha...
by ray_parkhurst
Mon Jan 31, 2011 1:47 pm
Forum: Equipment Discussions
Topic: Printing-Nikkor Adapter
Replies: 106
Views: 30616

Anyone have experience with the Nikkor-AM 120mm Large Format lens? The AM is "APO Macro", sounds intriguing. How hard are these LF lenses to adapt to SLR type mounts? Adapting isn't that hard, Schneider sells a Copal #0 to M39 thread adapter, from which it's easy to adapt further (the rear element ...
by ray_parkhurst
Mon Jan 31, 2011 7:54 am
Forum: Equipment Discussions
Topic: Printing-Nikkor Adapter
Replies: 106
Views: 30616

It's a beautiful lens but the narrow magnification range, large diameter, and short working distance make it extremely impractical. It also has large and odd mounting threads. Yes, it's a pretty specialized lens and couldn't be recommended for general usage. I think your printing Nikkor is probably...
by ray_parkhurst
Sat Jan 29, 2011 8:22 pm
Forum: Equipment Discussions
Topic: Printing-Nikkor Adapter
Replies: 106
Views: 30616

Talk about narrow depth of field...any idea how good this lens is? No, and there are very few users out there... see this http://homepage2.nifty.com/akiyanroom/redbook-e/repro/repro1pon.html Well, I tested an 85mm Repro-Nikkor and found it a very odd lens. It's NOT a camera lens! It wants to be mou...
by ray_parkhurst
Sat Jan 22, 2011 6:18 pm
Forum: Equipment Discussions
Topic: Printing-Nikkor Adapter
Replies: 106
Views: 30616

Realistically though, I dont' think you'll really beat the printing Nikkor. If you truly want higher quality, moving to bigger formats should be a more efficient use of time and resources than trying to find something better than a printing Nikkor. You could of course consider stitching several ima...
by ray_parkhurst
Sat Jan 22, 2011 7:42 am
Forum: Equipment Discussions
Topic: Printing-Nikkor Adapter
Replies: 106
Views: 30616

Oskar O wrote:Just remembered that there is also the repro nikkor 85/1, which is exotic and optimized for 1:1. Just sayin... :)
Talk about narrow depth of field...any idea how good this lens is?
by ray_parkhurst
Fri Jan 21, 2011 9:44 pm
Forum: Equipment Discussions
Topic: Printing-Nikkor Adapter
Replies: 106
Views: 30616

Yes, this is true. To fill the sensor with the same sized subject, you need 1.5x the magnification. The larger image circle (22mm instead of 15mm) isn't really a stress on the apo-rodagon-d, however, as it is designed for a 40mm radius circle. We'll see...I plan to buy one and compare flatness to t...
by ray_parkhurst
Fri Jan 21, 2011 1:59 pm
Forum: Equipment Discussions
Topic: Printing-Nikkor Adapter
Replies: 106
Views: 30616

Note too that this depends on the optimum aperture for the lens, and also on the sensor. A lens which is optimum at f/8 for example would give 522μm. Change the D90 for a D3 or D700 with its larger, 8.45μm photosites and that becomes 803μm at f/8. But for the D3 or D700 the magnifica...
by ray_parkhurst
Thu Jan 20, 2011 7:39 am
Forum: Equipment Discussions
Topic: Printing-Nikkor Adapter
Replies: 106
Views: 30616

It is a cast bronze coin, or 'potin'. Gaulish, of the Remi tribe (from the area of France around the modern town of Reims). Unlike your ancient from Gaul, most modern coins are pretty flat and unless the coin is not flat on the stage or the camera not mounted square on the stand I have not seen a s...
by ray_parkhurst
Tue Jan 18, 2011 7:28 am
Forum: Equipment Discussions
Topic: Printing-Nikkor Adapter
Replies: 106
Views: 30616

I suspect you're right about thte AA filter - some have them removed from their D3X cameras. :shock: We'll all have 50, 100Mpixels soon, then your PN will be in its "element"! my 55/2.8 Micro (and 55/3.5), I found the 2.8 to be sharper than the 3.5, contrary to some reviews. Did you? Yes, the 2.8 i...
by ray_parkhurst
Tue Jan 18, 2011 7:22 am
Forum: Equipment Discussions
Topic: Printing-Nikkor Adapter
Replies: 106
Views: 30616

OK which is best from these - not so easy huh? Actually, the D75/4 is the clear winner of the 3. The only thing making the decision difficult is the 55 Micro scale is smaller so resolution is harder to compare, but the D75/4 has better contrast. Step back 6-10 feet from your monitor and the compari...
by ray_parkhurst
Tue Jan 18, 2011 7:01 am
Forum: Equipment Discussions
Topic: Printing-Nikkor Adapter
Replies: 106
Views: 30616

M=1, 75mmf/4, yes. The same lens or its twin was used here where the limiting factor was the sensor. Have you tried a 55 f/2.8 micro? I've compared with my 55/2.8 Micro (and 55/3.5), but they are inferior both in center and at the edges compared with the PN and AEN. That 75/4 may give the exotics a...
by ray_parkhurst
Tue Jan 18, 2011 6:23 am
Forum: Equipment Discussions
Topic: Printing-Nikkor Adapter
Replies: 106
Views: 30616

Also these are short stacks - sometimes an individual frame looks slightly sharper. These differences are as a rule insignificant , to me. There's always other things - like here the lighting, which needs improvement first. I imagine you have a standard way with coins. I used a diffused flash one s...
by ray_parkhurst
Mon Jan 17, 2011 10:25 pm
Forum: Equipment Discussions
Topic: Printing-Nikkor Adapter
Replies: 106
Views: 30616

...snip... I think the 75 just takes it, but there's so little showing between these tests that a normal person owning any of them, wouldn't be justified in buying one of the others. The three deep scratches - my penknife. Sorry, Your Maj. The 75 definitely wins, though I agree all are pretty close...
by ray_parkhurst
Mon Jan 17, 2011 2:40 pm
Forum: Equipment Discussions
Topic: Printing-Nikkor Adapter
Replies: 106
Views: 30616

Sorry, 75mm not 74, this one: http://www.rodenstock-photo.com/en/main/products/lenses-for-enlarging-and-ccd/apo-rodagon-d/ They appear relatively frequently, usually under $200. Surely they can't be that good!? Rodenstock seem to be doing "digital " versions of some of their lenses. Hmmm :? Edit - ...