Nikon Plan Apo Lambda 20x - ok??

Everything relating to microscopy hardware: Objectives, eyepieces, lamps and more.
Message
Author
abednego1995
Posts: 137
Joined: Thu Dec 15, 2016 6:32 am

Re: Nikon Plan Apo Lambda 20x - ok??

#31 Post by abednego1995 » Wed Aug 26, 2020 12:00 am

Ah, Ok. I’ve found it anyway. Nikon writes different info on the front and back of the objective. The seller’s photo has it on the second photo. It’s a genuine PA Lambda 20x.

Cheers,
John

LouiseScot
Posts: 1167
Joined: Tue Jul 07, 2020 1:51 pm
Location: Scotland

Re: Nikon Plan Apo Lambda 20x - ok??

#32 Post by LouiseScot » Wed Aug 26, 2020 12:09 am

abednego1995 wrote:
Wed Aug 26, 2020 12:00 am
Ah, Ok. I’ve found it anyway. Nikon writes different info on the front and back of the objective. The seller’s photo has it on the second photo. It’s a genuine PA Lambda 20x.

Cheers,
John
Oki doki, fingers crossed!
Louise
A Nikon CF plan 20x; A Swift 380T; A DIY infinity corrected focus rail system with a 40x/0.65 Olympus Plan, a 10x/0.30 Amscope Plan Fluor, and a 20x/0.75 Nikon Plan Apo

LouiseScot
Posts: 1167
Joined: Tue Jul 07, 2020 1:51 pm
Location: Scotland

Re: Nikon Plan Apo Lambda 20x - ok??

#33 Post by LouiseScot » Sat Aug 29, 2020 4:55 pm

LouiseScot wrote:
Tue Aug 25, 2020 11:53 pm
abednego1995 wrote:
Tue Aug 25, 2020 11:48 pm
BTW, do you have the URL?
Your description of the listing having Lambda etc.. only in the listing and not on the barrel...is somewhat "concerning"
No, I didn't say that - it has all the info on the barrel except DIC and N2
Louise
Correction: it does actually have OFN25 DIC N2 on the other side of the barrel!
Louise
A Nikon CF plan 20x; A Swift 380T; A DIY infinity corrected focus rail system with a 40x/0.65 Olympus Plan, a 10x/0.30 Amscope Plan Fluor, and a 20x/0.75 Nikon Plan Apo

LouiseScot
Posts: 1167
Joined: Tue Jul 07, 2020 1:51 pm
Location: Scotland

Re: Nikon Plan Apo Lambda 20x - ok??

#34 Post by LouiseScot » Sat Aug 29, 2020 5:35 pm

Well the 20x plan apo came in the post yesterday. It's a cfi60 so pretty hefty all round - dwarfs my other rms objectives and weighs in at about 160g. As far as I can tell it's ok. Of course, I had to make an M25 adapter for it. Having tried it out I couldn't see anything obviously wrong with it. It has a large visible field which seems pretty flat. I don't think my old eyes do it justice. I've taken a couple of images with it and they've come out ok on a Canon 550d. A small bit of fibre/dust has crept on to the camera sensor so I'll have to give it a clean when I can (I'll check the auto cleaning option first!). Also, I need to do some flocking as I'm getting a central bright spot which is annoying.
Has anyone else bought one of these Nikon objectives?
Louise
A Nikon CF plan 20x; A Swift 380T; A DIY infinity corrected focus rail system with a 40x/0.65 Olympus Plan, a 10x/0.30 Amscope Plan Fluor, and a 20x/0.75 Nikon Plan Apo

Scarodactyl
Posts: 2775
Joined: Sat Mar 03, 2018 9:09 pm

Re: Nikon Plan Apo Lambda 20x - ok??

#35 Post by Scarodactyl » Sat Aug 29, 2020 9:43 pm

I have four (they are so cheap here in the US!). One normal, one normal I am mounting a cover slip to for no cover slip imaging and the two oem variants. I like them a lot though I use them way out of spec for imaging gem inclusions. I am still waiting on finding a good olympus m25 nosepiece to do a proper comparison for my usage.

LouiseScot
Posts: 1167
Joined: Tue Jul 07, 2020 1:51 pm
Location: Scotland

Re: Nikon Plan Apo Lambda 20x - ok??

#36 Post by LouiseScot » Sat Aug 29, 2020 10:15 pm

Scarodactyl wrote:
Sat Aug 29, 2020 9:43 pm
I have four (they are so cheap here in the US!). One normal, one normal I am mounting a cover slip to for no cover slip imaging and the two oem variants. I like them a lot though I use them way out of spec for imaging gem inclusions. I am still waiting on finding a good olympus m25 nosepiece to do a proper comparison for my usage.
Yeah, others have said they got them cheap in/from the states. Are any of yours marked with a Greek lambda and DIC N2?
Louise
A Nikon CF plan 20x; A Swift 380T; A DIY infinity corrected focus rail system with a 40x/0.65 Olympus Plan, a 10x/0.30 Amscope Plan Fluor, and a 20x/0.75 Nikon Plan Apo

Scarodactyl
Posts: 2775
Joined: Sat Mar 03, 2018 9:09 pm

Re: Nikon Plan Apo Lambda 20x - ok??

#37 Post by Scarodactyl » Sat Aug 29, 2020 10:49 pm

Two are, the other two are OEM from gene sequencers (or whatever) and are corrected for thicker cover glass--these are marked just with a part number.
I also got two extras for a potential geology project at my alma mater, though of course that's all on hold for the foreseeable future.

LouiseScot
Posts: 1167
Joined: Tue Jul 07, 2020 1:51 pm
Location: Scotland

Re: Nikon Plan Apo Lambda 20x - ok??

#38 Post by LouiseScot » Sat Aug 29, 2020 11:01 pm

Scarodactyl wrote:
Sat Aug 29, 2020 10:49 pm
Two are, the other two are OEM from gene sequencers (or whatever) and are corrected for thicker cover glass--these are marked just with a part number.
I also got two extras for a potential geology project at my alma mater, though of course that's all on hold for the foreseeable future.
A bit of a short working distance (1mm) for geology? Or will it be used with polished slides?
I'd love to be able to get some extra long working distance versions like the Mitutoyo's - but they cost an absolute fortune! My infinity setup is a hybrid extreme macro vertical rail system. So far, over the last couple of weeks I've acquired a cheap 10x plan fluor, the Nikon 20x plan apo and an Olympus 40x plan achro :) Mix and match ha ha. I know purists say you shouldn't mix but it's my setup and I'll do what I want to :) Anyway, I'll probably try some focus stacking with the Nikon tomorrow.
Louise
A Nikon CF plan 20x; A Swift 380T; A DIY infinity corrected focus rail system with a 40x/0.65 Olympus Plan, a 10x/0.30 Amscope Plan Fluor, and a 20x/0.75 Nikon Plan Apo

Scarodactyl
Posts: 2775
Joined: Sat Mar 03, 2018 9:09 pm

Re: Nikon Plan Apo Lambda 20x - ok??

#39 Post by Scarodactyl » Sun Aug 30, 2020 4:47 am

For geological work they'd be used on slides with crossed polarizers.
1mm of working distance is short but not unusable for reflected light work as long as your lights are strong enough. I use it with a 150w light with dual fiber optic goosenecks. You would want to mount a cover slip right against the front for imaging opaque subjects or you'll get a lot of spherical aberrations that kill contrast.

LouiseScot
Posts: 1167
Joined: Tue Jul 07, 2020 1:51 pm
Location: Scotland

Re: Nikon Plan Apo Lambda 20x - ok??

#40 Post by LouiseScot » Sun Aug 30, 2020 5:07 am

Scarodactyl wrote:
Sun Aug 30, 2020 4:47 am
For geological work they'd be used on slides with crossed polarizers.
1mm of working distance is short but not unusable for reflected light work as long as your lights are strong enough. I use it with a 150w light with dual fiber optic goosenecks. You would want to mount a cover slip right against the front for imaging opaque subjects or you'll get a lot of spherical aberrations that kill contrast.
Oh, I've no plans to attempt any reflected light imaging at 20x! I might possibly try some at 10x.
Louise
A Nikon CF plan 20x; A Swift 380T; A DIY infinity corrected focus rail system with a 40x/0.65 Olympus Plan, a 10x/0.30 Amscope Plan Fluor, and a 20x/0.75 Nikon Plan Apo

Post Reply