Search found 129 matches
- Tue May 02, 2023 6:47 am
- Forum: Equipment Exchange
- Topic: fs: LEICA HR PlanApo 5x/0.50 LWD WD 19mm
- Replies: 15
- Views: 4452
Re: fs: LEICA HR PlanApo 5x/0.50 LWD WD 19mm
What I've done with one other oddball lens was to take a piece of UHMW HDPE (Ultra-high Molecular Weight High-Density Polyethylene; a soft, heavy plastic) and drill it out to just a bit smaller than the outside diameter of the threads, then just screw in the lens. The plastic is soft enough to defor...
- Sun Feb 05, 2023 10:49 am
- Forum: Macro and Micro Technique and Technical Discussions
- Topic: Teleconverters in macro
- Replies: 43
- Views: 5005
- Wed Jan 25, 2023 7:29 am
- Forum: Macro and Micro Technique and Technical Discussions
- Topic: Teleconverters in macro
- Replies: 43
- Views: 5005
Re: Teleconverters in macro
That will also be effective f/25 as seen by the sensor. (Feff = m/(2*NA), m=14, NA = 0.28) With most modern sensors that will be well into diffraction territory, so expect some softness when pixel-peeping. --Rik Rik, is there a book you can point me too that discusses this type of calculation and t...
- Thu Jan 19, 2023 9:20 am
- Forum: Equipment Discussions
- Topic: Mitutoyo 20x/0.42 compared with workalike Hoopuo 20x/0.45
- Replies: 8
- Views: 2488
Re: Mitutoyo 20x/0.42 compared with workalike Hoopuo 20x/0.45
I'm very interested in this as well - I want a 20x but the $2000+ price tag concerns me!
- Thu Mar 24, 2022 8:58 am
- Forum: Equipment Discussions
- Topic: Three (relatively) inexpensive 50x Objectives: generic "LMPlanFl" vs Generic BD Plan vs Mitutoyo M50
- Replies: 9
- Views: 2582
Re: Three (relatively) inexpensive 50x Objectives: generic "LMPlanFl" vs Generic BD Plan vs Mitutoyo M50
Heh, ok. I wondered if maybe you grabbed the wrong lens for photos. Makes sense then!
- Wed Mar 23, 2022 8:06 am
- Forum: Equipment Discussions
- Topic: Three (relatively) inexpensive 50x Objectives: generic "LMPlanFl" vs Generic BD Plan vs Mitutoyo M50
- Replies: 9
- Views: 2582
Re: Three (relatively) inexpensive 50x Objectives: generic "LMPlanFl" vs Generic BD Plan vs Mitutoyo M50
Am I missing something that the BD Plan is marked 40x?
- Wed Feb 23, 2022 8:53 am
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Polycrase-(Y) crystal
- Replies: 3
- Views: 1004
Re: Polycrase-(Y) crystal
Very nice!
- Wed Feb 16, 2022 4:03 pm
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Rutile, Psuedobrookite from Paramount Canyon, NM
- Replies: 5
- Views: 945
Re: Rutile, Psuedobrookite from Paramount Canyon, NM
Though there could be a few ilmenites mixed in (and anatase for that matter), both the elongated orange and the blocky crystals tested as the niobium-rich variant of rutile. The striations are pretty distinctive, and, though not particularly visible in these photos, they are deep red rather than tru...
- Wed Feb 16, 2022 9:04 am
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Rutile, Psuedobrookite from Paramount Canyon, NM
- Replies: 5
- Views: 945
Re: Rutile, Psuedobrookite from Paramount Canyon, NM
These are rutile only - though the individual crystals in the center remind me more of anatase. My estimated size for those is 0.02 mm across, using the ruler tool in photoshop!
- Wed Feb 16, 2022 9:02 am
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Rutile, Psuedobrookite from Paramount Canyon, NM
- Replies: 5
- Views: 945
Re: Rutile, Psuedobrookite from Paramount Canyon, NM
This one is a crop from a larger pic, so a bit fuzzier. I need a 20x lens!
- Wed Feb 16, 2022 9:01 am
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Rutile, Psuedobrookite from Paramount Canyon, NM
- Replies: 5
- Views: 945
Re: Rutile, Psuedobrookite from Paramount Canyon, NM
Another specimen. This one is pretty deep in a cavity so a bit harder to shoot.
- Wed Feb 16, 2022 9:00 am
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Rutile, Psuedobrookite from Paramount Canyon, NM
- Replies: 5
- Views: 945
Rutile, Psuedobrookite from Paramount Canyon, NM
Several pics that I've worked on recently - Olympus EM-1 Mk III, Mitutoyo 10x, 1.4x teleconverter, WeMacro rail, Zerene. The teleconverter is the new experiment recently - I have had it for a while, but hadn't been using it with the Mitutoyo lens. It's worked out well as I've been learning to use it...
- Wed Jan 19, 2022 9:37 am
- Forum: Macro and Micro Technique and Technical Discussions
- Topic: Workflow - New WeMacro Rail
- Replies: 16
- Views: 6970
Re: Workflow - New WeMacro Rail
Since this got revived, I'll mention the workflow I've settled at, none of which is unique: - I'm controlling the WeMacro rail with an old iPhone - Camera is connected to a monitor for setting up the photos - Shooting RAW on SD cards, which I then transfer to the computer for processing (Olympus Wor...
- Thu Nov 18, 2021 8:41 am
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Cassiterite, Hematite, Quartz
- Replies: 5
- Views: 952
Re: Cassiterite, Hematite, Quartz
That's a beautiful shot! I wouldn't have guessed the small orange crystals were hematite or cassiterite--another example I suppose of how different the macro and micro worlds are. At thumbnail size I'd have guessed vanadinite. Thanks! There's a bunch that, at macro sizes, are completely opaque - th...
- Wed Nov 17, 2021 10:30 pm
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Cassiterite, Hematite, Quartz
- Replies: 5
- Views: 952
Cassiterite, Hematite, Quartz
From Paramount Canyon, in Sierra Co. New Mexico - I collected it this past summer. ETA: the font is weird, the FOV is 1.5 mm.