Search found 2620 matches

by NikonUser
Sat Dec 07, 2019 5:51 am
Forum: Equipment Exchange
Topic: Winter Lots of Gear Surplus Sale
Replies: 3
Views: 1810

Not that it's needed, but I agree with Chris S. I have purchased some of the offerings and as a 'finite bellows man' would have snapped up that 4x Nikon in a flash, except I have one (bought a much higher price than $250.00!)
by NikonUser
Thu Nov 07, 2019 10:12 am
Forum: Equipment Discussions
Topic: nonlinearity of an Olympus focus block
Replies: 12
Views: 791

Thanks for all the feedback Rik wrote " I'd place a modest bet on mirror/shutter shock propagating down through the microscope frame to slightly shift the stage with respect to the frame, or maybe even the slide with respect to the stage." The camera is on a separate stand, on same heavy table as th...
by NikonUser
Wed Nov 06, 2019 8:21 pm
Forum: Equipment Discussions
Topic: nonlinearity of an Olympus focus block
Replies: 12
Views: 791

Full frame showing multiple clusters of 50 dots/cluster
Image
by NikonUser
Wed Nov 06, 2019 8:10 pm
Forum: Equipment Discussions
Topic: nonlinearity of an Olympus focus block
Replies: 12
Views: 791

Chris - just 1 turn of the dial, 50slices @ 4µ Rik: Random jitter seems correct. I reshot the slide with the same settings but did not change the focus between exposures. Thus, the focus block was not touched. I simply took 50 shots with mirror up using a remote cable to fire the shutter (D810 has a...
by NikonUser
Wed Nov 06, 2019 8:19 am
Forum: Equipment Discussions
Topic: nonlinearity of an Olympus focus block
Replies: 12
Views: 791

Thanks Chris. Not sure if there is any slack. The setup is a 'complete' BH2/BHS stand except that the overhanging arm for the objectives being cut off. Camera and objective mounted vertically, not attached to microscope and not moved. Specimen is a slide-mount and is on the microscope stage. I move ...
by NikonUser
Wed Nov 06, 2019 5:29 am
Forum: Equipment Discussions
Topic: nonlinearity of an Olympus focus block
Replies: 12
Views: 791

nonlinearity of an Olympus focus block

Currently working on the genitalia of micromoths as an aid to species identification. Using a FF Nikon I rarely have to use a 10x objective, at 10x any dirt on the sensor does not show in the final image. For this tiny micro, a Stigmella sp., I used a MPlan 40x LWD. When looking at the 49 frames I c...
by NikonUser
Thu Oct 31, 2019 6:30 am
Forum: Nature Photography -- Macro and Close-up
Topic: crypic moth chooses background
Replies: 1
Views: 901

crypic moth chooses background

Cryptic moths avoid detection by matching the environment. One question is 'do they select their resting place to match their colour?' For some environments choosing is mute, moths living on sand dune or beaches have no need to choose (as long as they don't rest on plants); for moths living on peaty...
by NikonUser
Tue Oct 29, 2019 7:07 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Balloons in pits, brown marmorated stink bug
Replies: 22
Views: 5035

I have been following this topic with interest, never had any idea what they are!
The wax angle sounds reasonable; how about wax-dispersers?
by NikonUser
Wed Oct 23, 2019 7:42 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: pretty micro
Replies: 6
Views: 1516

difficult ?

Yes.
This is one of the several Acleris spp. here in the NE NA.
It is a female Acleris busckana, dissection on BG:

https://bugguide.net/node/view/1740887
by NikonUser
Tue Oct 15, 2019 10:07 am
Forum: Equipment Discussions
Topic: SWEBO focusing rail
Replies: 28
Views: 4024

If you are prepared to do some work then a microscope focus block is your best bet; accurate to 2 microns.
I see an Olympus block on ebay for $65.00
https://www.ebay.com/itm/Olympus-BH2-BH ... SwTyxdAM4i
by NikonUser
Sat Oct 12, 2019 12:03 pm
Forum: Equipment Discussions
Topic: SWEBO focusing rail
Replies: 28
Views: 4024

kaleun96 wrote: "for deep stacks it will really save you time and energy." I have never felt the need for an automatic rail, but perhaps I have never run 'deep stacks' I just manually stacked a micro (moth) using 2 flashes. 1st image was at 3.26 pm the 61st at 3.29 pm. Not sure what I could do in th...
by NikonUser
Fri Oct 11, 2019 8:01 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Balloons in pits, brown marmorated stink bug
Replies: 22
Views: 5035

insect 'stinks'

Perhaps the standard text on insect defensive secretiions is:

https://www.amazon.ca/Love-Insects-Thom ... 0674018273

he does discuss stink bugs, no time now to read through it!
by NikonUser
Thu Oct 10, 2019 5:36 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: pretty micro
Replies: 6
Views: 1516

Thanks Keith
Those small grass moths are Crambids, maybe not ornate but have 'mean' faces with long noses and many with beautiful wings with pure gold and pure silver scaling:
http://mothphotographersgroup.msstate.e ... h&state=IL
by NikonUser
Wed Oct 09, 2019 1:44 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: pretty micro
Replies: 6
Views: 1516

pretty micro

In the Lepidopterists's world anything that isn't a butterfly is a moth; anything that isn't a macromoth is a micro. Micros are made for macro photography! In light trap, am 9x19 Nikon D7200, MF 105mm macro, f/8, Zerene PMax http://www.photomacrography.net/forum/userpix/569_9x192_acleris_lat_1.jpg h...
by NikonUser
Tue Sep 24, 2019 1:22 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Flying Hedgehog
Replies: 3
Views: 842

Flying Hedgehog

Also a dust trap
Found in my BL moth trap this am, 24ix19
Hystricia abrupta
Nikon D7200, Nikon 105 micro, bellows, Zerene stack
Image