Search found 200 matches

by Bob-O-Rama
Fri Mar 03, 2023 11:52 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Using an Alt-Az telescope mount as a motion control stage
Replies: 0
Views: 984

Using an Alt-Az telescope mount as a motion control stage

Here is a short video demonstrating the use of an Alt-Az telescope mount as a 2-axis stage for closeup photography. https://bob-o-rama.smugmug.com/Infinity-Photo-Optical-K2-SC-Long-Distance-Microscope/i-Rj7q3Zw I had built this a few years ago but had to cannibalize it. The above is "first light" te...
by Bob-O-Rama
Fri Mar 03, 2023 10:24 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: 1908 gold coin
Replies: 11
Views: 3254

Re: 1908 gold coin

Thats a nice fixture and it seems to work great. ( I have a very ugly version of that and it works pretty well, mirror salvaged from a dead digital projector. ) Where did you source the mirror?
by Bob-O-Rama
Mon Feb 27, 2023 12:49 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Weevil Time Killing
Replies: 18
Views: 1531

Re: Weevil Time Killing

=D> wow, how did you clean the weevil? I see only one dust particle in four pictures :shock: A cheap ultrasonic cleaner (though they have doubled/tripled in price from two years ago), distilled water with a drop or two of Jet Dry Finish for about 6ixty seconds and blotted on a coffee filter to abso...
by Bob-O-Rama
Mon Feb 27, 2023 12:41 pm
Forum: Photography Through the Microscope
Topic: Corn kernel showing endosperm
Replies: 5
Views: 984

Re: Corn kernel showing endosperm

Amaizeing! But really, nice imagery and something I had not seen in that sort of detail before. Interesting. Any idea what the different stains are targeting?
by Bob-O-Rama
Mon Feb 27, 2023 12:35 pm
Forum: Photography Through the Microscope
Topic: Horse Ascaris egg mitosis
Replies: 4
Views: 840

Re: Horse Ascaris egg mitosis

Those are the type of eggs you don't want in your egg salad. I think a lot of that grain is just just inherent in the staining, there is actually a lot of structure to cytoplasm. You have some very eggciting images from this and your other recent eggsplorations.
by Bob-O-Rama
Tue Feb 07, 2023 1:55 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: 2nd try stacking with... Kalanchoe?
Replies: 4
Views: 1161

Re: 2nd try stacking with... Kalanchoe?

They are very nicely composed, and well executed. If this is your second attempt, you are doing pretty well, IMO.
by Bob-O-Rama
Tue Feb 07, 2023 1:42 pm
Forum: Photography Through the Microscope
Topic: A micro riddle
Replies: 10
Views: 1329

Re: A micro riddle

That is gorgeous and the comb like structure is very much unexpected. I wonder if this is growing at a fast enough rate you could observe it with a time lapse.
by Bob-O-Rama
Mon Jan 23, 2023 2:58 pm
Forum: Photography Through the Microscope
Topic: Bleb formation, amoeboid movement
Replies: 2
Views: 680

Re: Bleb formation, amoeboid movement

So is this in response to a "food this way" sort of chemical signal? Or does branching just occur, and whatever ones are successful are reinforced?
by Bob-O-Rama
Mon Jan 23, 2023 2:41 pm
Forum: Photography Through the Microscope
Topic: hymenium of an Ascomycete fungus
Replies: 7
Views: 979

Re: hymenium of an Ascomycete fungus

Its the photographic equivalent of "See Naples and die."
by Bob-O-Rama
Fri Jan 20, 2023 12:58 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: An excellent tool to make yourself Rheinberg filters
Replies: 6
Views: 2211

Re: An excellent tool to make yourself Rheinberg filters

My wife is into scrap booking ( in fact at a huge scrap booking convention this weekend ) - she probabaly has 7 different ways to make this already. LOL!
by Bob-O-Rama
Fri Jan 20, 2023 12:43 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: How to get bright white backgrounds?
Replies: 39
Views: 4889

Re: How to get bright white backgrounds?

( The suggestion about using collimated rear illumination is likely the best solution. ) It may also be possible to use chromakey to enable your masks to be selected more reliably. You could distinguish between the chromakey background and white-ish specular highlights from the coins edges. Also the...
by Bob-O-Rama
Fri Jan 20, 2023 11:30 am
Forum: Photography Through the Microscope
Topic: Klaus Kemp "After Moller" diatom arrangement
Replies: 2
Views: 663

Re: Klaus Kemp "After Moller" diatom arrangement

Amazing, and a lot of work I imagine. Its great that you are keeping this melding of science and art alive.
by Bob-O-Rama
Thu Jan 19, 2023 12:55 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Some jumping spiders, focus stacked
Replies: 7
Views: 1002

Re: Some jumping spiders, focus stacked

Those are just awesome. I guess I get easily frustrated, but pretty much any time I try to take a picture of anything that it alive it usually tries to sting me in the eye, or waits till everything is dialed in to jump or fly away.
by Bob-O-Rama
Thu Jan 19, 2023 12:42 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Mud Dauber Cache
Replies: 6
Views: 870

Re: Mud Dauber Cache

Honestly I never really thought too much about what was inside those things. Very interesting and nicely photographed. I'm thinking they would also make for a great timelapse subject.
by Bob-O-Rama
Thu Jan 19, 2023 12:38 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Black Widow Spider
Replies: 2
Views: 711

Re: Black Widow Spider

Are those individual eggs, or is that like a dozen egg sacks which warrant some sort of military response?