Search found 4859 matches

by Lou Jost
Thu Apr 15, 2021 3:42 pm
Forum: Photography Through the Microscope
Topic: Microscopy method comparison: Triceratium grande Diatom
Replies: 3
Views: 42

Re: Microscopy method comparison: Triceratium grande Diatom

Yes, really interesting comparison, and fantastic results even if you had only posted one of them. I'll probably be alone in this opinion but I find that I like the simple first one the best.
by Lou Jost
Tue Apr 13, 2021 4:50 pm
Forum: Equipment Discussions
Topic: Mejiro Genossen Fl0530 4.0/110mm 0.5x-3x macro lens On eBay
Replies: 29
Views: 538

Re: Mejiro Genossen Fl0530 4.0/110mm 0.5x-3x macro lens On eBay

Glad to hear they are ok. I apologize for raising a red flag.
Lou
by Lou Jost
Tue Apr 13, 2021 2:36 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: B&W
Replies: 8
Views: 229

Re: B&W

Thanks Adalbert. What is a control layer? Is that like a Layer mask?
by Lou Jost
Tue Apr 13, 2021 12:23 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: High key contrast method (post-processing tip)
Replies: 8
Views: 223

Re: High key contrast method (post-processing tip)

The key difference is that B&W conversion allows you to adjust the contribution of individual hues to brightness in (what becomes) the luminance channel.
I think that is right, it's the main reason why here are special B+W conversion operators in addition to a simple Convert to Grayscale command
by Lou Jost
Tue Apr 13, 2021 8:01 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: B&W
Replies: 8
Views: 229

Re: B&W

Can you give more explanation about your technique? I think this would be helpful for my scientific work....Thanks in advance.
by Lou Jost
Sun Apr 11, 2021 4:34 pm
Forum: Equipment Discussions
Topic: How Stupid Can Someone be? How about you?
Replies: 18
Views: 388

Re: How Stupid Can Someone be? How about you?

Mark, for the vaccines that require deep freezing during transport, I think there would be some chance that these conditions were violated at some point. Certainly here in Ecuador I would be very eager to see if I really got a good-quality dose of the vaccine.
by Lou Jost
Sun Apr 11, 2021 10:18 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: B&W
Replies: 8
Views: 229

Re: B&W

Excellent conversions! They remind me of artists' ink drawings, or of prints from old entomology manuals.
by Lou Jost
Sun Apr 11, 2021 5:43 am
Forum: Equipment Discussions
Topic: Pixel shift vs no shift example
Replies: 25
Views: 445

Re: Pixel shift vs no shift example

Doing deep stacks, insects and the like, without telecentric lenses, just seems doomed to parallax hell in my view. When I need to do this, I usually work with telecentric lenses and objectives. Much of my work is in liquid at 1.5-8x, and in that range a lens combo using a reversed MFT lens in fron...
by Lou Jost
Sat Apr 10, 2021 7:54 pm
Forum: Equipment Discussions
Topic: How Stupid Can Someone be? How about you?
Replies: 18
Views: 388

Re: How Stupid Can Someone be? How about you?

Guess maybe I should have bought all 5? Well, maybe not the one with the fungus spot... I've done more stupid things than I can keep track of. Last week I paid for a two-hour taxi ride to a site I needed to surveyu with a drone. Forgot the cable connecting the controller to the tablet that runs the...
by Lou Jost
Sat Apr 10, 2021 7:43 pm
Forum: Equipment Discussions
Topic: Pixel shift vs no shift example
Replies: 25
Views: 445

Re: Pixel shift vs no shift example

I actually do use a "light" version of stitching for my scientific work. It is convenient because it doesn't need a separate set-up. I use medium format tube lenses with a shift adapter to a Nikon camera mount. I just do two or sometimes three tiles to catch some protruding tail-like features that w...
by Lou Jost
Sat Apr 10, 2021 1:36 pm
Forum: Beginners Macro
Topic: meta equipment choices in 2021
Replies: 20
Views: 551

Re: meta equipment choices in 2021

I think you won't regret your decision. Especially since you are also working hard to learn all the other things besides the camera.
by Lou Jost
Sat Apr 10, 2021 11:48 am
Forum: Equipment Discussions
Topic: Pixel shift vs no shift example
Replies: 25
Views: 445

Re: Pixel shift vs no shift example

That's a great point. It is nice to have empirical data on it! I hope most of us are opening our images in Photoshop.
by Lou Jost
Fri Apr 09, 2021 2:04 pm
Forum: Equipment Discussions
Topic: Pixel shift vs no shift example
Replies: 25
Views: 445

Re: Pixel shift vs no shift example

I've owned 3 cameras with pixel-shift, none of them had the 4X "Sony" approach, so can't comment on that.
It's worth mentioning that the Pentax K-1 also has this kind of four-image pixel shift. It makes a big difference over single shots.
by Lou Jost
Fri Apr 09, 2021 2:02 pm
Forum: Equipment Discussions
Topic: Pixel shift vs no shift example
Replies: 25
Views: 445

Re: Pixel shift vs no shift example

I don't believe there is such thing as "medium format look" though. Not to mention how difficult (and expensive) it would be to work in a wide magnification range with a MF camera. I agree that some aspects of the alleged "medium format look" don't exist. But other aspects (DR and smoothness of col...
by Lou Jost
Fri Apr 09, 2021 6:13 am
Forum: Equipment Discussions
Topic: Pixel shift vs no shift example
Replies: 25
Views: 445

Re: Pixel shift vs no shift example

It would be interesting to compare a pixel-shifted image with a stitch of four normal images. We'd lose the dynamic range improvement (gained from averaging multiple shots at each pixel) and but would probably improve the resolution, though probably with some moire. Using a standard controller and a...