Hi KarlGaff, welcome to the forum! You have posted truely excellent cross polarization images, a good presentation of your work, but please be aware of our posting guidelines: The image posting limit for all Image Galleries is six (6) images during the course of one (1) calendar day take a look at h...

This is my version, much worse looking than the original by Chris but working well Just a Chinese spare eyecup for my Canon DSLR, a 12mm diameter plastic tube wall fixation, some epoxy, a battery box and a switch. IMG_0514br.jpg IMG_0516br.jpg IMG_0519br.jpg I've observed that if I forget switching ...

Admin note: Topic moved from General Discussion Forum and Community Announcements forum because the subject fits better in Equipment Discussions

Nikon Small World 2020 Photomicrography Competition awards, take a look at https://www.nikonsmallworld.com/galleries/2020-photomicrography-competition Quite few pictures are from forum members, hunt for them And here you have the videos: https://www.nikonsmallworld.com/galleries/2020-small-world-in-...

Great work again, Saul

Nikon BHMJ

BHMJ is an Olympus model, I don't know the existence of this denomination in Nikon models, what am I missing?

What's the WD?
I have an older Nikon MPlan Apo 40/0.80 and its WD is only 0.7mm

I've received the parts, mounted and preliminary tested the whole setup. I've coupled the camera with a bellows and this has allowed me to find the parfocal point. Finding it has taken me lots of attempts but now it's done: The distance from the V-T end to the sensor is 164mm (120mm up to the Canon ...

If you are planning to use it for macro style work (direct projection without eyepiece) be aware of that most finite objectives of this vintage need compensating eyepieces to complete the aberrations correction of the objective. I'm not sure with this one but almost sure.
Alan, correct me if wrong

If drifting down continues over the time (not just until the temperature is constant) it will not be due to thermal expansion. I don't know if it can happen with BX models but with CH and BH if someone has forced to turn the fine focus knobs in opposite senses they unscrew from the axis and get loos...

Hi Martin, welcome aboard! Is this Meiji equipment what you have? MA 150.jpg The adapter will be fully adequate if the photoeyepiece is. Because the Canon APSC sensor is smaller than the 35mm film you will see a bit too much crop if you use the same photoeyepiece (the standard magnification for 35mm...

Of course you can test any material just by seeing if it blocks fluorescence of paper when inserted into the UV light path; I am not sure there is a need for anything more complicated. Is this not sufficient? Lacking access to spectrophotometers this is basically what I do, white paper and textiles...

The reference tube length is the distance from the objective shoulder to the eyepiece shoulder. In most systems including Nikon the primary image is expected 10mm below the eyepiece shoulder -this is why Itchty recommends 150mm for 160 objectives and 200mm for 210 ones-, but this matters without eye...

In some Nikon SMZ stereos pdfs I've found the camera adapter I need but only named " F mount adapter " without a model number/designation useful to find it. Clearly it couples into the 42mm V-T tube I already have ordered. If I can't find it likely it will be substituted with a custom adapter based ...

What kind of projective?, please

Your Nikon objectives, are marked 160/0.17...210/0 or...?

If you get more magnification this can easily lead to less crisp image, in particular with your 40X you can easily get empty magnification