Hi there good people,
Any recommendations for a good 40x objective LWD with RMS threads that doesn't cost an arm?
40x LWD
Moderators: rjlittlefield, ChrisR, Chris S., Pau
-
- Posts: 1152
- Joined: Thu Mar 07, 2013 5:24 am
-
- Posts: 1152
- Joined: Thu Mar 07, 2013 5:24 am
I can't think of many options. I had a look at your website; your setup seems to work well with Nikon objectives.
There are a few 40 LWD and ELWD from Nikon with 210 mm tube length and without cover glass. Some have > 2 mm free working distance. That would require a 50 mm intermediate tube being added to your microscope.
http://www.krebsmicro.com/mplan.pdf
Alternatively, a biological LWD objective with correction collar and the collar set to 0.
http://www.krebsmicro.com/Nikon_CF.pdf
There are a few 40 LWD and ELWD from Nikon with 210 mm tube length and without cover glass. Some have > 2 mm free working distance. That would require a 50 mm intermediate tube being added to your microscope.
http://www.krebsmicro.com/mplan.pdf
Alternatively, a biological LWD objective with correction collar and the collar set to 0.
http://www.krebsmicro.com/Nikon_CF.pdf
- enricosavazzi
- Posts: 1474
- Joined: Sat Nov 21, 2009 2:41 pm
- Location: Västerås, Sweden
- Contact:
The MPLAN ELWD 40x 0.50 in particular has slightly more than 10 mm working distance, so illumination of the subject is easier.Ichthyophthirius wrote:[...]
There are a few 40 LWD and ELWD from Nikon with 210 mm tube length and without cover glass. Some have > 2 mm free working distance. That would require a 50 mm intermediate tube being added to your microscope.
[...]
I found my specimen relatively good (that was years before we all started stacking, though), but of course not at the level of Mitutoyo M Plan Apos. The 0.50 NA is the limiting factor, plus some CA, and DOF is of course minuscule. It is somewhat tolerant of shorter tube length (and with the latter it gives a lower magnification and slightly higher working distance).
The only test I can find is at http://savazzi.net/photography/photomacrolenses2.htm
--ES
Hi,
Thanks for your time and great tips.
I will check them out
Edit: Found it on eBay for 305$
Thanks for your time and great tips.
I will check them out
It will be a FF sensor on my EOS 5D IIAnother important question- what size sensor?
This is very interesting.The MPLAN ELWD 40x 0.50 in particular has slightly more than 10 mm working distance, so illumination of the subject is easier.
Edit: Found it on eBay for 305$