Search found 4726 matches
- Thu Jan 21, 2021 9:14 pm
- Forum: Equipment Discussions
- Topic: New Lumix G9 vs used Canon 5DsR - what is better for extreme macro?
- Replies: 6
- Views: 271
Re: New Lumix G9 vs used Canon 5DsR - what is better for extreme macro?
I have used both FF and MFT systems, and I don't think it is realistic to rely on pixel-shifting to make up the difference in resolution between FF and MFT. The results of pixel shifting are excellent, but as others have stated above, it takes too long to use as a standard procedure, unless you only...
- Thu Jan 21, 2021 2:13 pm
- Forum: Equipment Discussions
- Topic: What even is this: Plan Apo 40x/1.0 W infinity f=180 unbranded m25 75mm long
- Replies: 9
- Views: 260
Re: What even is this: Plan Apo 40x/1.0 W infinity f=180 unbranded m25 75mm long
Thanks for the information, Macro Cosmos.
- Thu Jan 21, 2021 8:27 am
- Forum: Equipment Discussions
- Topic: What even is this: Plan Apo 40x/1.0 W infinity f=180 unbranded m25 75mm long
- Replies: 9
- Views: 260
Re: What even is this: Plan Apo 40x/1.0 W infinity f=180 unbranded m25 75mm long
Does anyone know what WLSM means on that objective?"Another water immersion objective with some weird housing: eBay item number:263140217445"
- Wed Jan 20, 2021 7:36 pm
- Forum: Equipment Discussions
- Topic: What even is this: Plan Apo 40x/1.0 W infinity f=180 unbranded m25 75mm long
- Replies: 9
- Views: 260
Re: What even is this: Plan Apo 40x/1.0 W infinity f=180 unbranded m25 75mm long
Wow, what a strange item. A very interesting find.
- Wed Jan 20, 2021 7:40 am
- Forum: Macro and Micro Technique and Technical Discussions
- Topic: 8000ED Image Circle
- Replies: 2
- Views: 173
Re: 8000ED Image Circle
Nice test! Many exotic lenses have bigger image circles than we typically use. We should really take advantage of that, like you are doing.
- Sun Jan 17, 2021 11:26 am
- Forum: Equipment Discussions
- Topic: 50X objective recommendation
- Replies: 31
- Views: 1186
Re: 50X objective recommendation
I use several Nikon focusing blocks bought cheaply on eBay, and two of the three are excellent. The third was unacceptable but I could have returned it if I had lived in the US and been able to inspect it on delivery.
- Fri Jan 15, 2021 5:53 pm
- Forum: Equipment Discussions
- Topic: 50X objective recommendation
- Replies: 31
- Views: 1186
Re: 50X objective recommendation
You can get step sizes almost that size with simple, cheap off-the-shelf microscope focusing block driven by the cheap WeMacro MicroMate.Wow - what kind of rail are you using to reach ~250 nm steps? That is closer to linear servo territory.
- Thu Jan 14, 2021 4:28 pm
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Various Seed Pods
- Replies: 6
- Views: 283
Re: Various Seed Pods
I think black or white are safe choices, but I also think that other backgrounds are often interesting. But they only work if they are carefully chosen to nicely harmonize or contrast with the subject.
- Thu Jan 14, 2021 10:56 am
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Various Seed Pods
- Replies: 6
- Views: 283
Re: Various Seed Pods
I very much agree with Kevin. The choice of background is almost as important as the choice of subject, and these textured industrial-green backgrounds are unpleasant to look at and distracting from the subjects. Diffusion would greatly improve your pictures. It is one of the most important things w...
- Thu Jan 14, 2021 10:48 am
- Forum: Macro and Micro Technique and Technical Discussions
- Topic: Looking for advice to improve sharpness
- Replies: 7
- Views: 370
Re: Looking for advice to improve sharpness
One thing many forum members have noticed in the past is that those cone-shaped adapters can cause flare and should be flocked. Additional diffusion would also help, as you noted. But I suspect the main problem here is objective quality. There is no way anyone can make a good 10x 0.25 objective for ...
- Mon Jan 11, 2021 4:06 pm
- Forum: Equipment Discussions
- Topic: Schneider-Kreutznach lens parameters
- Replies: 5
- Views: 265
Re: Schneider-Kreutznach lens parameters
Aha! Now the negative beta makes sense. The image is inverted.
- Sun Jan 10, 2021 5:27 am
- Forum: Equipment Discussions
- Topic: Monochromatic Microscopes?
- Replies: 21
- Views: 913
Re: Monochromatic Microscopes?
I want one!!!! That depiction of the light path is crazy. I had no idea things had gotten that complex. projection optics with a numerical aperture (NA) of 0.33 I am a little surprised at the low NA. Some of my own visible-light photolithography lenses have larger NA. For example a 10x 0.38 for 436n...
- Sat Jan 09, 2021 10:43 pm
- Forum: Equipment Discussions
- Topic: Monochromatic Microscopes?
- Replies: 21
- Views: 913
Re: Monochromatic Microscopes?
Such beautiful optical technology.
- Sat Jan 09, 2021 11:56 am
- Forum: Macro and Micro Technique and Technical Discussions
- Topic: Sensor-Pan system
- Replies: 6
- Views: 320
Re: Sensor-Pan system
Great to hear you have this working. I have been doing this as well, and there are some very easy ways to do this for those of us with more limited ambitions. Limited shift adapters exist for MFT, APS, and FF; of course one needs to use a lens with a larger image circle than the sensor size. These a...
- Fri Jan 08, 2021 8:08 pm
- Forum: Equipment Discussions
- Topic: New 1.4x Lens Test Results Online
- Replies: 31
- Views: 1061
Re: New 1.4x Lens Test Results Online
Thanks for the info on the 80mm lens, I will have to try mine at those magnifications. I look forward to learning about the QV microscope.