Nikon 2.5x M Plan vs. 40/2.8 Apo-Componon

Have questions about the equipment used for macro- or micro- photography? Post those questions in this forum.

Moderators: ChrisR, Chris S., Pau, rjlittlefield

NikonUser
Posts: 2621
Joined: Thu Sep 04, 2008 2:03 am
Location: southern New Brunswick, Canada

Nikon 2.5x M Plan vs. 40/2.8 Apo-Componon

Post by NikonUser »

Would be a useful lens for this magnification but.....
This small moth, L: 6.80 mm, is too large for my 4x objective which badly vignettes on the FF D810.
Unfortunately the 2.5x is even worse than the 4x; and with less than a flat field.
1398.2 Coleophora deauratella, full frame and cropped (moth too delicate to attempt to clean off the 'junk').
Nikon 2.5x M Plan, D810, Zerene stack
Attachments
22vii20 coleophora-1.jpg
22vii20 coleophora-2.jpg
Last edited by NikonUser on Thu Jul 23, 2020 4:48 am, edited 1 time in total.
NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.

Nikon camera, lenses and objectives
Olympus microscope and objectives

Macro_Cosmos
Posts: 901
Joined: Mon Jan 15, 2018 9:23 pm
Location: Sydney

Re: Nikon 2.5x M Plan

Post by Macro_Cosmos »

Eh, simply put, this is quite abysmal. Why not try the 2.5x-5x Laowa Ultra-Macro?

I cannot be certain, but many Nikon objectives correct CA and the flat field through the use of their (proprietary) tube lens and eye pieces.
Is this the finite objective that requires 210mm of tubing, or a newer one? There could be other issues with the objective such as decentering, while it shouldn't be that bad at just 2.5x... it could be.

NikonUser
Posts: 2621
Joined: Thu Sep 04, 2008 2:03 am
Location: southern New Brunswick, Canada

Re: Nikon 2.5x M Plan

Post by NikonUser »

Yes, a finite objective needing 210 mm tubing; NA 0.075; lens looks perfect. I reckon on a 'scope with a 10x eyepiece image will be good.
I have had this lens for a while, I now remember why I never use it.
I have a few enlarger lenses which give decent images at this mag., will reshoot the moth
NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.

Nikon camera, lenses and objectives
Olympus microscope and objectives

Scarodactyl
Posts: 418
Joined: Sat Apr 14, 2018 10:26 am

Re: Nikon 2.5x M Plan

Post by Scarodactyl »

Macro_Cosmos wrote:
Wed Jul 22, 2020 10:03 am
I cannot be certain, but many Nikon objectives correct CA and the flat field through the use of their (proprietary) tube lens and eye pieces.
They do not. Nikon has been fully internally corrected since the biophot in the mid 70s.

abednego1995
Posts: 67
Joined: Tue Nov 01, 2016 11:53 pm

Re: Nikon 2.5x M Plan

Post by abednego1995 »

Low power objectives are difficult to design within their parfocal limits, and that doesn't help much with their image circle too. Used on a scope they'll perform as advertised.

Cheers,
John

Online
JKT
Posts: 157
Joined: Fri Oct 28, 2011 9:29 am
Location: Finland
Contact:

Re: Nikon 2.5x M Plan

Post by JKT »

You really should switch systems as this is a good territory for Canon MP-E65. :wink:
02721 D6c Coleophora deauratella (170720)(Taalintehdas) [Id J Tabell].jpg
Admittedly it depends on the resolution you want and the size of the moth. I only aim for 3000 px wide pictures, so MP-E can handle this and somewhat smaller ones as well. With Stigmellas and such I'd need something else for optimum results. Mitu 5x might do the trick.

Mainly I'm just pointing out that we have similar interests. :D

Macro_Cosmos
Posts: 901
Joined: Mon Jan 15, 2018 9:23 pm
Location: Sydney

Re: Nikon 2.5x M Plan

Post by Macro_Cosmos »

Scarodactyl wrote:
Wed Jul 22, 2020 1:07 pm
Macro_Cosmos wrote:
Wed Jul 22, 2020 10:03 am
I cannot be certain, but many Nikon objectives correct CA and the flat field through the use of their (proprietary) tube lens and eye pieces.
They do not. Nikon has been fully internally corrected since the biophot in the mid 70s.
Thought so, that's according to the tiny sample I've handled... I did read about it somewhere, I think the author might have been mistaken.

NikonUser
Posts: 2621
Joined: Thu Sep 04, 2008 2:03 am
Location: southern New Brunswick, Canada

Re: Nikon 2.5x M Plan vs. 40/2.8 Apo-Componon

Post by NikonUser »

Thanks everyone.
Amazing that JKT can spread such small moths. Too late for me to switch to Canon, too much invested in Nikon equipment.
I did manage to clean up the moth, re-shot it with the Apo-Componon, same setup as before, different lens:
Attachments
coleophora apo.jpg
NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.

Nikon camera, lenses and objectives
Olympus microscope and objectives

Online
JKT
Posts: 157
Joined: Fri Oct 28, 2011 9:29 am
Location: Finland
Contact:

Re: Nikon 2.5x M Plan vs. 40/2.8 Apo-Componon

Post by JKT »

NikonUser wrote:
Thu Jul 23, 2020 4:52 am
Amazing that JKT can spread such small moths.
Sometimes I get lucky. :lol:

Was the APO-Componon with extension or stacked? If former, I'll have to try it.

NikonUser
Posts: 2621
Joined: Thu Sep 04, 2008 2:03 am
Location: southern New Brunswick, Canada

Re: Nikon 2.5x M Plan vs. 40/2.8 Apo-Componon

Post by NikonUser »

The lens is a fixed f/2.8, reversed on a Nikon bellows
(I've tried spreading micros, impossible - need skill)
NU.
student of entomology
Quote – Holmes on ‘Entomology’
” I suppose you are an entomologist ? “
” Not quite so ambitious as that, sir. I should like to put my eyes on the individual entitled to that name.
No man can be truly called an entomologist,
sir; the subject is too vast for any single human intelligence to grasp.”
Oliver Wendell Holmes, Sr
The Poet at the Breakfast Table.

Nikon camera, lenses and objectives
Olympus microscope and objectives

Online
JKT
Posts: 157
Joined: Fri Oct 28, 2011 9:29 am
Location: Finland
Contact:

Re: Nikon 2.5x M Plan vs. 40/2.8 Apo-Componon

Post by JKT »

I'll have to try mine on extension then.

(Not impossible with enough magnification AS LONG AS they are fresh. Old ones - forget it.)

Lou Jost
Posts: 4525
Joined: Fri Sep 04, 2015 7:03 am
Location: Ecuador
Contact:

Re: Nikon 2.5x M Plan vs. 40/2.8 Apo-Componon

Post by Lou Jost »

The Laowa 2.5x to 5x is really useful for this range of magnifications, especially at the lower end.

Post Reply Previous topicNext topic