Search found 4524 matches

by Lou Jost
Mon Sep 07, 2020 3:37 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Monochrome Camera / Techniques?
Replies: 47
Views: 925

Re: Monochrome Camera / Techniques?

I would not recommend the K1. It is not mirrorless, so your lens choices are limited (though you can convert the mount to Nikon, as I did) and you will rapidly accumulate lots of shutter actuations when stacking with stitching. Strangely, the shutter fires even when using silent electronic shutter; ...
by Lou Jost
Mon Sep 07, 2020 2:26 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Monochrome Camera / Techniques?
Replies: 47
Views: 925

Re: Monochrome Camera / Techniques?

Are you guys saying that PS2DNG will re-compose the composite image, and will do so without excessive sharpening?
That's what I would now conclude from all this. And it would do so without your having to save the 4 individual shifted images; they get saved into a single file.
by Lou Jost
Mon Sep 07, 2020 12:05 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: minerals from Slovakia
Replies: 13
Views: 2364

Re: minerals from Slovakia

Yes, I think those are great! Very beautiful.
by Lou Jost
Mon Sep 07, 2020 11:53 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Monochrome Camera / Techniques?
Replies: 47
Views: 925

Re: Monochrome Camera / Techniques?

We're both right. "When it launched its crop-sensor flagship camera, the Pentax K-3 II, back in April, 2015, Ricoh debuted a brand-new feature that was hugely useful to anyone wanting the maximum per-pixel sharpness and dealing primarily with relatively static subjects. Dubbed Pixel Shift Resolution...
by Lou Jost
Mon Sep 07, 2020 6:43 am
Forum: Equipment Discussions
Topic: Moisture in my Raynox lens. Suggestions?
Replies: 18
Views: 565

Re: Moisture in my Raynox lens. Suggestions?

I do not think pennies are desiccants, or at least not in practice. Maybe their surface film binds with water but that is a tiny volume.
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by Lou Jost
Sun Sep 06, 2020 4:21 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Monochrome Camera / Techniques?
Replies: 47
Views: 925

Re: Monochrome Camera / Techniques?

Steve, most cameras do not export four shifted RAWs, so that was why I didn't think that is what you meant. I think Sony may be the only one; you mentioned Pentax but the K-1 (which I have) does the combining in-camera, like Olympus and Panasonic and all others that I can think of. None of these all...
by Lou Jost
Sun Sep 06, 2020 1:05 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Monochrome Camera / Techniques?
Replies: 47
Views: 925

Re: Monochrome Camera / Techniques?

Have you compared the colour channels and seen that (after scaling or curving) they would cause incomparable lightness differences? I don't think I understand the question. Since the red will appear very dark, and blue areas will be bright, the result will look nothing like a true monochrome image,...
by Lou Jost
Sun Sep 06, 2020 12:58 pm
Forum: Equipment Discussions
Topic: Moisture in my Raynox lens. Suggestions?
Replies: 18
Views: 565

Re: Moisture in my Raynox lens. Suggestions?

Those dessicant pouches are jokes, they saturate almost immediately unless the package is airtight (that's why dessicant with indicator dyes are so useful--you can tell when the dessicant is useless). You will have to heat them gently for along time (if they are silica) before you can use them again.
by Lou Jost
Sun Sep 06, 2020 11:49 am
Forum: Equipment Discussions
Topic: Moisture in my Raynox lens. Suggestions?
Replies: 18
Views: 565

Re: Moisture in my Raynox lens. Suggestions?

The standard trick that tropical biologists use is to put it in a bag with very dry rice, and seal it.
by Lou Jost
Sun Sep 06, 2020 11:42 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Monochrome Camera / Techniques?
Replies: 47
Views: 925

Re: Monochrome Camera / Techniques?

I've done this with lasers, and there is crossover betrween colors, but this doesn't save you from the problem that a bright red object will appear dark under monochromatic blue light. In real monochrome photography, that area would be light (in the absence of the filters that B&W photographers are ...
by Lou Jost
Sun Sep 06, 2020 10:31 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Monochrome Camera / Techniques?
Replies: 47
Views: 925

Re: Monochrome Camera / Techniques?

Steve, I am not sure what you are doing. Are you just shifting a single whole image by one pixel in each direction? In a real 4-image pixel-shift, the sensor is shifted so that each pixel gets a genuine measurement of each color (twice for green) of a pixel-sized point on the subject. The combining ...
by Lou Jost
Sun Sep 06, 2020 10:09 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Monochrome Camera / Techniques?
Replies: 47
Views: 925

Re: Monochrome Camera / Techniques?

Wouldn't a band-pass filter in front of the lens do this trick? No, not if you want to photograph luminance. With a narrow-band filter or monochromatic light, the only things that will be bright in the image are things of that color. "someone asked me whether it wouldn't be easier to move to one of...
by Lou Jost
Fri Sep 04, 2020 11:19 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Monochrome Camera / Techniques?
Replies: 47
Views: 925

Re: Monochrome Camera / Techniques?

I don't see any way to hide the presence of a Bayer filter unless color is perfectly constant. You can eliminate the Bayer filter's mosaicing effect by using 4-shot pixel shifting camera like the Pentax k-1. That can be treated as a monochrome camera, and the cheapest FF monochrome by far. For macr...
by Lou Jost
Thu Sep 03, 2020 6:00 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Monochrome Camera / Techniques?
Replies: 47
Views: 925

Re: Monochrome Camera / Techniques?

I have a monochrome Micro Four Thirds camera with cooled sensor. I run it with the sensor below zero centigrade, and this makes a big difference. If you get a monochrome camera, I recommend you get a cooled one. I bought mine several years ago so there are surely better ones out there now. The huge ...