Search found 88 matches

by naturepics43
Fri Jan 08, 2021 8:56 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Windows of Papilio ulysses wing scale
Replies: 16
Views: 1864

Re: Windows of Papilio ulysses wing scale

PDF of (Sculpted-multilayer optical effects in two species of Papilio butterfly) available at Google Scholar. https://ore.exeter.ac.uk/repository/bit ... sequence=6
by naturepics43
Thu Nov 19, 2020 9:01 pm
Forum: Equipment Discussions
Topic: Does anyone have the Laowa 100mm x2 macro lens?
Replies: 10
Views: 2126

Re: Does anyone have the Laowa 100mm x2 macro lens?

I purchased the Laowa 100mm 2x macro lens from Adorama about 2 months ago, I do not have focus creep with my copy. I just now set my lens to ∞ and looked in the front lens or more correctly the UV filter. It looks pretty "dry" inside lens tube. Just a light film of lubricant. Is it possible that the...
by naturepics43
Mon Feb 10, 2020 6:25 pm
Forum: Equipment Discussions
Topic: Schneider Componon-S 100mm f/5.6 Tube Lens Test
Replies: 20
Views: 2472

Robert, Thanks for sharing your great lens test results, not just this one but all of them. I visit you site often and read and reread your lens tests often. Your recommendations have been very helpful. I really appreciate all the time and effort you spend doing these lens tests and sharing the resu...
by naturepics43
Wed Feb 05, 2020 2:53 pm
Forum: Equipment Discussions
Topic: Screw size of Nikon PB-5 bellows
Replies: 17
Views: 1665

Thanks much. So if the BR2-A gets you from the F mount to 52mm threads, do I still need the 55mm to 52 step down or can I just go from the BR2-A to the 52mm-RMS adapter to the objective? Not sure whey I need the 55-52 step down if I am already at 52 coming off the BR2-A. And it's the Br2A "reversin...
by naturepics43
Tue Feb 04, 2020 10:39 pm
Forum: Equipment Discussions
Topic: Screw size of Nikon PB-5 bellows
Replies: 17
Views: 1665

but what exactly do I use on the front end to attach an RMS (Nikon 40x) objective? Lots of different adapters for the front. Here is what I use, Nikon BR2-A (F mount to male 52mm threads) + 55mm to 52mm step down ring (MUST have 52mm female threads all the way thru) + M52-M20.3 adapter (Also ca be ...
by naturepics43
Tue Feb 04, 2020 5:59 pm
Forum: Equipment Discussions
Topic: Screw size of Nikon PB-5 bellows
Replies: 17
Views: 1665

The screw size is 1/4 20 (The standard used on photography gear). NO, the holes on a 200mm arca plate will not line up. This is what I used. https://www.amazon.com/DLR-2502B-Desmond-Double-Arca-Swiss-Compatible/dp/B00HJD6BCM The slots in the plate line up nicely. One thing you want to check is that ...
by naturepics43
Fri Oct 11, 2019 8:59 am
Forum: Equipment Discussions
Topic: Question about the Scanner Nikkor 7 element ED lens
Replies: 5
Views: 884

Enrico & Typestar,

Thanks for all the valuable info. I'm sure this will help me figure out where the lens came from. OR, maybe not worry about where it came from and enjoy what seems to be a very good lens. Thanks again for your help.

Allen
by naturepics43
Wed Oct 09, 2019 12:05 pm
Forum: Equipment Discussions
Topic: Question about the Scanner Nikkor 7 element ED lens
Replies: 5
Views: 884

Question about the Scanner Nikkor 7 element ED lens

I just received a lens that the seller described as “Imaging Lens for Nikon Super Coolscan IV (LS-40 ED) scanner”. (The Scanner Nikkor 7 element ED lens). The lens arrived as pictured on eBay. When I removed the lens I noticed that it only had one deep groove. All the pictures that I’ve seen here & ...
by naturepics43
Tue Oct 01, 2019 5:59 pm
Forum: Administrator's Appreciation Gallery...Macro and Close-up Images
Topic: Male and female Napoleon Spider (Synema globosum) with prey.
Replies: 4
Views: 4619

Fantastic stack. A well deserved honor. Thanks for sharing.
by naturepics43
Thu Aug 08, 2019 11:35 am
Forum: Equipment Discussions
Topic: Minolta DImage 5400 lens - actual resolution?
Replies: 3
Views: 1618

Have you read this report on the 5400 II ? Almost at the end, under the heading "Picture Quality" they tested with a USAF test chart.
https://www.filmscanner.info/MinoltaDim ... 400II.html
by naturepics43
Tue Jul 09, 2019 11:45 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Pointing for small subjects?
Replies: 8
Views: 3010

Depends on subject & what pose you intend to use. Try to position the pin where it won't show or where it will be easy to clone out. I have not tried to mount a millipede or isopod so can't be of any help there. The last isopod I stacked, I "posed" on a tan rock. Small butterflies or moths I always ...
by naturepics43
Thu Jul 04, 2019 10:02 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Pointing for small subjects?
Replies: 8
Views: 3010

My preferred method is gluing an insect mounting pin under the body of the insect. You can position the insect at any angle very easily. If the pin shows in your stack you can clone it out when editing your stack. Pointing is usually for small insects or insects with hard exoskeletons. Be aware that...
by naturepics43
Mon Feb 11, 2019 2:31 pm
Forum: Equipment Exchange
Topic: Olympus BH2 Objective Turret
Replies: 17
Views: 6363