Search found 4642 matches

by Lou Jost
Mon Nov 02, 2020 2:11 pm
Forum: Equipment Discussions
Topic: Adapting aps-C to nikon: a few different methods
Replies: 9
Views: 790

Re: Adapting aps-C to nikon: a few different methods

Can teleconverters be part of a solution when the projected magnification is not enough? I find the Nikon 1.4x TC to be very useful for this kind of thing.
by Lou Jost
Mon Nov 02, 2020 1:11 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Plans & stacks
Replies: 7
Views: 916

Re: Plans & stacks

Integrated circuits or such starkly geometric objects would probably also suffer under non-plans.
I wonder if there has been a misunderstanding of Rik's answer? Are you making 3-D models? If not, Rik said the field curvature does not matter when stacking.
by Lou Jost
Sun Nov 01, 2020 7:41 am
Forum: Equipment Exchange
Topic: Thorlabs 2x Superapochromat on eBay
Replies: 5
Views: 800

Re: Thorlabs 2x Superapochromat on eBay

Is the size of its image circle known?
by Lou Jost
Sun Nov 01, 2020 7:28 am
Forum: Equipment Discussions
Topic: Macroscopes - some musings
Replies: 9
Views: 964

Re: Macroscopes - some musings

I have the big heavy Leica PlanApo 2x front objective. It is chroma-free, I don't see any CA in the image. When attached to a tube lens, the center is perfect but there is what I would describe as exaggerated perspective, and there is a lot of distortion in the edges. I am hopeful that there is some...
by Lou Jost
Sun Nov 01, 2020 6:33 am
Forum: Equipment Discussions
Topic: Review of Mitakon Creator 85mm f/2.8 1-5X Mark II
Replies: 9
Views: 1017

Re: Review of Mitakon Creator 85mm f/2.8 1-5X Mark II

Nice review, but I have one minor suggestion. You say that no one you know uses filters for these types of lenses. However, filters are very useful and I know many who use them, including myself. Cross-polarization is a common technique in macrophotography. I also use barrier filters for fluorescenc...
by Lou Jost
Wed Oct 28, 2020 6:48 am
Forum: Photography Through the Microscope
Topic: Porcupine quill
Replies: 8
Views: 782

Re: Porcupine quill

That's much better!
by Lou Jost
Tue Oct 27, 2020 2:49 pm
Forum: Photography Through the Microscope
Topic: Porcupine quill
Replies: 8
Views: 782

Re: Porcupine quill

I am puzzled, the scale seems way off if this is the cross section of a porcupine quill. It would appear from your magnification of 100x that this quill is about the diameter of a large diatom. Yet quills are much thicker than that. What is going on?
by Lou Jost
Tue Oct 27, 2020 9:10 am
Forum: Equipment Discussions
Topic: Looking for a compact, rugged camera
Replies: 6
Views: 646

Re: Looking for a compact, rugged camera

In addition to Chris' question, we also need to know what you want to do with it besides macro.

We give our reserve rangers Panasonic bridge cameras with a Raynox lens. Good macro and excellent for birds and mammals (600mm equivalent lens). Not good in low light though.
by Lou Jost
Tue Oct 27, 2020 4:50 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: 1st attempting at modifying a condenser
Replies: 3
Views: 519

Re: 1st attempting at modifying a condenser

I'm gradually working through it.
And we are all learning a lot in the process.
by Lou Jost
Mon Oct 26, 2020 6:01 pm
Forum: Equipment Discussions
Topic: MJKZZ Extreme system and ...
Replies: 34
Views: 2069

Re: MJKZZ Extreme system and ...

It appears that the entire camera/lens assembly is "resting" on the microscope bracket. That's right. Super-easy, fast to change lenses, but perfectly sturdy. Sometimes I use rings that go through the hole in the stage support and can be locked down from above and below, making a very rigid assembl...
by Lou Jost
Mon Oct 26, 2020 1:48 pm
Forum: Equipment Discussions
Topic: MJKZZ Extreme system and ...
Replies: 34
Views: 2069

Re: MJKZZ Extreme system and ...

I move the subject manually or with a small micrometer-driven xy stage, or I put a modified x-y stage on the microscope block.

_1160346.jpg
I made a hole in the stage so a microscope objective fits through it.
by Lou Jost
Mon Oct 26, 2020 1:07 pm
Forum: Equipment Discussions
Topic: MJKZZ Extreme system and ...
Replies: 34
Views: 2069

Re: MJKZZ Extreme system and ...

_1160765.jpg _1160762.jpg This is a little odd, I've fastened the block to a UM2 column as a counterweight. But there are other do-it-yourself options. For example, I could have drilled holes in the marble vertical plates and fastened the microscope block to that. Or I could have gotten a whole mic...
by Lou Jost
Mon Oct 26, 2020 11:05 am
Forum: Equipment Discussions
Topic: Use of 3D-printer in close-up photography
Replies: 10
Views: 957

Re: Use of 3D-printer in close-up photography

Very clever and efficient! Congratulations.
by Lou Jost
Mon Oct 26, 2020 8:32 am
Forum: Equipment Discussions
Topic: MJKZZ Extreme system and ...
Replies: 34
Views: 2069

Re: MJKZZ Extreme system and ...

I use Nikon blocks with nested focusing and fine-focusing knobs. The ones with just a single knob will not work well. The good ones are regularly available on ebay. I use it to move my camera whose lens rests on the round stage mount that goes with these blocks. Or I can use it to move the subject, ...
by Lou Jost
Mon Oct 26, 2020 5:47 am
Forum: Equipment Discussions
Topic: MJKZZ Extreme system and ...
Replies: 34
Views: 2069

Re: MJKZZ Extreme system and ...

There is an economical alternative that is excellent: the WeMacro MicroMate plus a good used microscope ( or jsut the focusing block) with fine focus ability. I use this almost exclusively now. It is far more stable and with much finer steps than WeMacro or Cognisys rails (I don't know anything abou...