Search found 602 matches

by dmillard
Mon May 24, 2021 5:22 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Portulaca seeds
Replies: 15
Views: 826

Re: Portulaca seeds

Wonderful discovery and images! I can also confirm (from purchased packets) that the seeds of Portulaca oleracea are darker, less textured, and considerably larger than the colorful seeds of Portulaca grandiflora . I'm sure that they will look even better when they are collected directly from the pl...
by dmillard
Sat Mar 20, 2021 2:10 pm
Forum: Equipment Discussions
Topic: Rodenstock APO-Rodagon-N 150mm f/4 EL Lens
Replies: 15
Views: 1527

Re: Rodenstock APO-Rodagon-N 150mm f/4 EL Lens

Congratulations on your find! I just copied a couple of pages from a Rodenstock catalog that you may find useful (although there is the strong possibility that you already have this information :) )
ApRod2.jpg
ApRod1.jpg
by dmillard
Sun Feb 28, 2021 4:41 pm
Forum: Equipment Discussions
Topic: 8x HR NA 0.32 + α7R IV 4 Image Pixel Shift Mode
Replies: 33
Views: 3464

Re: 8x HR NA 0.32 + α7R IV 4 Image Pixel Shift Mode

......I thought it was a symmetrical lens so I didn't bother! The tube lens used for the sample is a Rodenstock APO-Gerogon and it according to Rodenstock it is symmetrical. They were designed to be used in reduction or mag without having to remove the lens to reverse it. Range was given from 1:3 t...
by dmillard
Mon Feb 22, 2021 8:31 am
Forum: Equipment Discussions
Topic: USPS Priority Mail Lens Shipments Gone Missing?
Replies: 23
Views: 2292

Re: USPS Priority Mail Lens Shipments Gone Missing?

Two weeks ago I received a package from Shanghai in 5 days via DHL. By contrast, our post offices in central Texas just reopened this morning after a week's inactivity. https://communityimpact.com/austin/central-austin/weather/2021/02/18/us-postal-service-operations-in-austin-suspended-indefinitely-...
by dmillard
Wed Dec 16, 2020 4:14 pm
Forum: Equipment Discussions
Topic: Testing Olympus UPlanFL N 4x 0.13 (FN 26.5)
Replies: 28
Views: 6102

Re: Testing Olympus UPlanFL N 4x 0.13 (FN 26.5)

These are some images I just took with the Olympus UPlanApo 4x/0.16, UMPlanFL 10x/0.30, and an LMPlanFL 20x/0.40 on a Sony A6300, using an ITL200 tube lens. The predicted magnification would have been 200/180 times each objective's nominal magnification - I measured 4.38x rather than the expected 4....
by dmillard
Wed Dec 09, 2020 3:59 pm
Forum: Equipment Discussions
Topic: Testing Olympus UPlanFL N 4x 0.13 (FN 26.5)
Replies: 28
Views: 6102

Re: Testing Olympus UPlanFL N 4x 0.13 (FN 26.5)

I found this lens used at a good price and being aware that Charles Krebs uses it with excellent results I bought it. It came pretty dirty and after a good cleaning I'm testing it. I find the results pretty good although my testing abilities and subjects are not the best. Chromatic aberrations are ...
by dmillard
Thu Nov 19, 2020 9:41 am
Forum: Equipment Exchange
Topic: For Trade: Tomioka 32mm f3.5 and Gretag 120
Replies: 4
Views: 2176

Re: For Trade: Tomioka 32mm f3.5 and Gretag 120

I just received one of the Gretag 120s from Ray a few days ago - it was in better condition than I had anticipated from the description. :)

David
by dmillard
Sat Oct 10, 2020 11:58 am
Forum: Equipment Discussions
Topic: Schneider locking screws
Replies: 29
Views: 5881

Re: Schneider locking screws

Thanks, good to know there are at least two variations of these locking screws. You are welcome. Just to clarify, I measured a locking screw from a Unifoc-58, not the smaller Unifoc-12 for which Ray needed replacement screws. I was hoping to appropriate it, at least temporarily, for the MacroVaron,...
by dmillard
Sat Oct 10, 2020 11:20 am
Forum: Equipment Discussions
Topic: Schneider locking screws
Replies: 29
Views: 5881

Re: Schneider locking screws

Just wondering, are these thumbscrews identical to the ones from the Xenoplan machine vision line of lenses? Anyone owning both types of lenses? I measure the Xenoplan ones to have a width of 2.4mm over the peaks of the screw thread and be 4mm in length, with the final mm close to the knurled head ...
by dmillard
Sat Jul 18, 2020 5:19 am
Forum: Equipment Discussions
Topic: linos lens 105mm F 5.6 need help
Replies: 7
Views: 2340

Re: linos lens 105mm F 5.6 need help

Doesn't the 105/5.6 feature a Schneider Optics V-groove dovetail mount? I could be wrong. If I'm not, an original Schneider adaptor that converts the dovetail to M42 can be had for around $50 used. Not cheap but you do get Schneider's quality. The Schneider mounts are V38, but the Linos 5.6 inspec....
by dmillard
Fri Jul 17, 2020 6:40 am
Forum: Equipment Discussions
Topic: Test wafer distribution: Many features, includes res chart
Replies: 80
Views: 20936

Re: Test wafer distribution: Many features, includes res chart

I just got mine. It was left on our front porch yesterday, even though it had been marked as delivered quite a while ago. I assume it was placed in the wrong mail box, and our anonymous neighbor had their own reasons for the delay. Anyway, it is broken into numerous pieces, but one of them is large ...
by dmillard
Sat Jun 27, 2020 12:38 pm
Forum: Equipment Discussions
Topic: US Buyers Beware of Tariffs on EU Products
Replies: 20
Views: 3881

Re: US Buyers Beware of Tariffs on EU Products

An addendum: On Thursday the U.S. Trade Representative proposed an additional 25% tariff on German lenses (as well as increased import fees on many other items). This proposal is open to public comment until July 26th. https://ustr.gov/sites/default/files/enforcement/301Investigations/Review_of_Acti...
by dmillard
Sat Jun 27, 2020 10:09 am
Forum: Equipment Discussions
Topic: US Buyers Beware of Tariffs on EU Products
Replies: 20
Views: 3881

Re: US Buyers Beware of Tariffs on EU Products

Thank you for the update Robert! This definitely reduces my occasional temptations for early a.m. Buy It Now purchases :shock:

Best regards,
David
by dmillard
Sat Jun 27, 2020 7:14 am
Forum: Equipment Discussions
Topic: US Buyers Beware of Tariffs on EU Products
Replies: 20
Views: 3881

Re: US Buyers Beware of Tariffs on EU Products

Thanks David, I'm hopeful that it may be the perfect FF tube lens. Another potential option for a FF tube lens may be a Pentax 67 300mm f/4 EDIF. It doesn't have the spectral sensitivity range of the Zeiss lens, weighs considerably more, and has a greater front filter thread (82mm vs 60mm), but it ...
by dmillard
Fri Jun 26, 2020 8:26 pm
Forum: Equipment Discussions
Topic: US Buyers Beware of Tariffs on EU Products
Replies: 20
Views: 3881

Re: US Buyers Beware of Tariffs on EU Products

Are there more countries besides the ones you listed which have a 25% tariff? Or is itthe place of manufacture that matters? But for most products that is not obvious. For lenses (and other photographic equipment), the place of manufacture is restricted to Germany. See https://captureintegration.co...