Search found 2887 matches

by Chris S.
Sat Sep 04, 2010 12:22 am
Forum: Equipment Discussions
Topic: Polarizing filter for microscope objective
Replies: 45
Views: 14454

Craig, I lacked the BR-3 and ordered one immediately after your earlier post. It hasn’t come in yet. Will certainly give your exact approach a try when it does. Your approach is simpler and quicker than any other I can conceive. I am a bit concerned about potentially overworking the hardware holding...
by Chris S.
Sat Sep 04, 2010 12:07 am
Forum: Equipment Discussions
Topic: Novoflex Macrolight Plus--anyone tried it?
Replies: 46
Views: 13871

Flash is already 'cold' light so I'm not sure what the advantage is. There are various lab grade fiber optic illuminators with hot bulbs inside... or LCD bulbs, which are cool (low temp). Paul, I'm not concerned about heat, but the ability to place light with ease and precision. The other night I p...
by Chris S.
Sat Sep 04, 2010 12:02 am
Forum: Equipment Discussions
Topic: Novoflex Macrolight Plus--anyone tried it?
Replies: 46
Views: 13871

Craig, thanks for the links to other setups where these are in use. While I'd seen them in the past, I was paying attention to other elements of the rigs and could not have found them now when I need them. I don't know how you remembered which threads showed them in the photos--you must have a scari...
by Chris S.
Fri Sep 03, 2010 11:56 pm
Forum: Equipment Discussions
Topic: Novoflex Macrolight Plus--anyone tried it?
Replies: 46
Views: 13871

David—thank you very much! Your review is exactly what I needed. You've tipped me in the direction I guess I really wanted to go anyway—just build my own. For way less than the cost of this unit, I can get the parts to build exactly what I want. I’m not even sure it will take all that much time—when...
by Chris S.
Fri Sep 03, 2010 1:11 am
Forum: Equipment Discussions
Topic: Novoflex Macrolight Plus--anyone tried it?
Replies: 46
Views: 13871

Nobody? No one with hands-on experience is available to comment? I'd really appreciate it if such a person would share a few words. I'm currently helping a researcher to image a very difficult subject--entirely as a favor. He has some budget that could be used to help me with equipment, but I want t...
by Chris S.
Thu Sep 02, 2010 12:24 am
Forum: Equipment Discussions
Topic: Novoflex Macrolight Plus--anyone tried it?
Replies: 46
Views: 13871

Novoflex Macrolight Plus--anyone tried it?

The Novoflex Macrolight Plus has been mentioned in these fora as an expensive, but potentially good, solution for macro lighting (it permits both continuous lighting and flash). Does anyone have actual experience with it? Reviews are hard to find. http://www.novoflex.com/en/products/macro-accessorie...
by Chris S.
Thu Sep 02, 2010 12:12 am
Forum: Equipment Discussions
Topic: Polarizing filter for microscope objective
Replies: 45
Views: 14454

Since my remaining questions were buried in my excess of words, let me give them a bump. Any thoughts? "Is there any reason that the analyzer has to be close behind the objective? If not, I'm thinking of putting it much closer to the camera. Like many users of Nikon bellows, I need to put an extensi...
by Chris S.
Wed Sep 01, 2010 12:43 am
Forum: Equipment Discussions
Topic: Shutter for continuous light
Replies: 11
Views: 2248

Andrew, got to say that the spectral characteristics in that data sheet scare me a bit. Looks like a big dip just below green, among other things. But if your experience leads you to think it's OK, that says a lot--hard to argue with results, and you're picky. Pau, I've repeatedly considered the Nov...
by Chris S.
Wed Sep 01, 2010 12:10 am
Forum: Equipment Discussions
Topic: Polarizing filter for microscope objective
Replies: 45
Views: 14454

Wow--I'm not surprised to be deluged by good advice at this forum, but I sure appreciate it. Thanks much, all! From what I've learned, I'll definitely place the analyzer (didn't know this term--thanks, Pau) between lens and camera. And it appears I should buy a cheap but good used analyzer on eBay--...
by Chris S.
Tue Aug 31, 2010 1:59 am
Forum: Equipment Discussions
Topic: Polarizing filter for microscope objective
Replies: 45
Views: 14454

Thanks a bunch, Craig. Looks beautiful. I like it, and will likely cobble together something very much like what you came up with.

Best,

--Chris
by Chris S.
Tue Aug 31, 2010 1:43 am
Forum: Equipment Discussions
Topic: Polarizing filter for microscope objective
Replies: 45
Views: 14454

Thanks, Pau. Ok, I'll put the polarizer behind the objective--nice that is happens to be the easiest way to do it--especially if I go with Craig's approach. There are sources out there that say (apparently wrongly) that the polarizer must be in front of the lens. Coming from a standard photography b...
by Chris S.
Tue Aug 31, 2010 1:21 am
Forum: Equipment Discussions
Topic: Polarizing filter for microscope objective
Replies: 45
Views: 14454

Craig, I am familiar with those pieces--but please add a photo to this thread--I'd love to see how you did it. Like you, I'm thinking to go with the best polarizer money can buy. Mine are all B&W, but they live in the field bag and there they should probably stay. Will likely purchase another B&W fo...
by Chris S.
Tue Aug 31, 2010 12:56 am
Forum: Equipment Discussions
Topic: Polarizing filter for microscope objective
Replies: 45
Views: 14454

Thanks, Andrew. Makes sense. I'd like to see some other folks weigh in on the accuracy of this source, since it has been caught in substantial error a few times. However, it also appears that Nikon polarized optiphots were built this way. If so, we really need a drop in-filter option for the bellows...
by Chris S.
Tue Aug 31, 2010 12:47 am
Forum: Equipment Discussions
Topic: Shutter for continuous light
Replies: 11
Views: 2248

Re: Shutter for continuous light

Seriously though, this is why I keep playing with LED illumination - you run at low power (probably low current and PWM) for continuous then switch to a high current pulse for flash. I've got a bench setup now where I can run a Cree at 1A + PWM then go to 4A pulses. Andrew, are you getting a full s...
by Chris S.
Tue Aug 31, 2010 12:42 am
Forum: Equipment Discussions
Topic: Shutter for continuous light
Replies: 11
Views: 2248

Elf: Close light-path shutter, open camera shutter, wait for camera vibration to die down, open light-path shutter, wait appropriate exposure time, close light path shutter, close camera shutter.

Simple, right? :)

Bummer about the Surplus shed.

--Chris