Search found 687 matches
- Wed Dec 08, 2021 11:43 am
- Forum: Equipment Discussions
- Topic: How about Pentacon lenses?
- Replies: 12
- Views: 1426
Re: How about Pentacon lenses?
At home, I have been able to test the 200 Pentacon after printing the appropriate thread adapter. Not a bad lens, but I have a certain feeling that the 180 Rodenstock that I am using normally. I think the old Pentacon has a bit more chromatic aberration around the edges. Since I only have an infinit...
- Mon Nov 22, 2021 10:14 am
- Forum: Macro and Micro Technique and Technical Discussions
- Topic: How to photograph a profile?
- Replies: 16
- Views: 4059
Re: How to photograph a profile?
A reflector telescope is a perfect parallel ray illumination system, placing the focus in the place where the eyepiece is normally placed
- Sat Nov 20, 2021 5:49 am
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Cassiterite, Hematite, Quartz
- Replies: 5
- Views: 951
Re: Cassiterite, Hematite, Quartz
are analyzed, the cassiterite? I have sphalerite micros with the same color and shape.
- Thu Nov 18, 2021 8:31 am
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Cassiterite, Hematite, Quartz
- Replies: 5
- Views: 951
Re: Cassiterite, Hematite, Quartz
Great control of lightning!
- Mon Nov 15, 2021 8:45 am
- Forum: Equipment Discussions
- Topic: How about Pentacon lenses?
- Replies: 12
- Views: 1426
Re: How about Pentacon lenses?
Here the photo with the phone
- Mon Nov 15, 2021 3:48 am
- Forum: Equipment Discussions
- Topic: How about Pentacon lenses?
- Replies: 12
- Views: 1426
Re: How about Pentacon lenses?
While I eagerly await the Pentacon, I have made an impromptu test. Since I don't have my collection of adapters here, I have placed a x4 on a stand and lowered the camera with the 100 macro until it almost touched the x4 adapter. In this way, the microscope objective and the camera objective are not...
- Sat Nov 13, 2021 10:58 am
- Forum: Equipment Discussions
- Topic: How about Pentacon lenses?
- Replies: 12
- Views: 1426
Re: How about Pentacon lenses?
wow, how many responses! This morning it was just a crazy idea jumping through my few brain cells. Now I'm looking on ebay for one of these targets. Although I will try to wait for the Leipzip Flohmarkt, if they don't confine us first.
- Sat Nov 13, 2021 3:04 am
- Forum: Equipment Discussions
- Topic: How about Pentacon lenses?
- Replies: 12
- Views: 1426
Re: How about Pentacon lenses?
My idea with this lens is to use it as a tube lens, but I want to try to put a pap motor that drives the focus ring and use that for the photo shifts for stacking. I have no idea if this can work, but it is cheap to test and if it works the set will be very rigid, as it does not need a displacement ...
- Mon Nov 08, 2021 10:12 am
- Forum: Equipment Discussions
- Topic: How about Pentacon lenses?
- Replies: 12
- Views: 1426
How about Pentacon lenses?
Anyone here know how work as tube lens the Pentacon 200 f4 telephoto lenses? I have seen some in the markets of Leipzig, where I am working now
- Tue Oct 19, 2021 8:06 am
- Forum: Equipment Discussions
- Topic: Pentax camera body
- Replies: 4
- Views: 745
Re: Pentax camera body
I bought a second-hand pentax because I had the intuition that a camera without low-pass filters would work much sharper when shooting with closed apertures. In this matter, I am delighted. But when I use the liveview on an external screen with HDMI with my Canon, the image brightens and darkens as ...
- Tue Oct 19, 2021 12:56 am
- Forum: Equipment Discussions
- Topic: Pentax camera body
- Replies: 4
- Views: 745
Pentax camera body
Someone are here using a Pentax body with liveview in his microscope? I buyed a second hand one, but I have some doubts...
- Wed Oct 13, 2021 9:03 am
- Forum: Equipment Discussions
- Topic: How good are alternatives (clones) to Mitutoyo lenses
- Replies: 111
- Views: 18805
Re: How good are alternatives (clones) to Mitutoyo lenses
very near... Brochantite, but from SpainNow that's a nice specimen! Almost looks like a Greek brochantite to me, but I could be wrong.
- Mon Oct 04, 2021 4:43 am
- Forum: Equipment Discussions
- Topic: How good are alternatives (clones) to Mitutoyo lenses
- Replies: 111
- Views: 18805
Re: How good are alternatives (clones) to Mitutoyo lenses
I recently got a x10 from a member of this forum that is exact to the photo you post (well, the photo shows 0.30 and mine is 0.28) and, although I may not be very demanding about the results, I'm excited about the results. I'm thinking of changing the rest my lens now ... If what I know about astron...
- Wed Sep 08, 2021 4:59 am
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Some minerals
- Replies: 13
- Views: 1868
Re: Some minerals
those are very sharp images without halos, congratulations
- Tue Sep 07, 2021 12:01 pm
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Marcasite
- Replies: 4
- Views: 718
Re: Marcasite
maybe hematite?
but nice work, it is ancient?
but nice work, it is ancient?