Search found 72 matches

by viktor j nilsson
Fri Oct 18, 2019 6:13 pm
Forum: Beginner's corner
Topic: Nikon Plan APO 40x 160 TL in an OMAX (Chinese Microscope) 160 TL?
Replies: 9
Views: 1098

Re: Nikon Plan APO 40x 160 TL in an OMAX (Chinese Microscope) 160 TL?

Remember too that there are Nikon planapo and Nikon CF planapo, so there are differences between those too. I believe those need differing compatible eyepieces CFW and CFWN respectably. Someone more familiar with Nikon than I , would know more about their compatability specs and performance charact...
by viktor j nilsson
Thu Sep 26, 2019 9:19 pm
Forum: Microscopes and optics
Topic: Upgrading a Nikon E Plan PH3 Objective
Replies: 11
Views: 929

Re: Upgrading a Nikon E Plan PH3 Objective

While I don't own all of the Nikon objective grades in their phase contrast versions, I have fairly significant collection of Nikon CF/CFN objectives so that I should be able to provide a fairly informed opinion about the optical quality of each series. Nikon 40x: I have an E plan 40x 0.65, a CFN pl...
by viktor j nilsson
Mon Sep 09, 2019 6:44 pm
Forum: Microscopes and optics
Topic: Stereo Triocular or Binocular
Replies: 25
Views: 1446

Re: Stereo Triocular or Binocular

I think that the best solution for you would be to use microscope objectives directly on a bellows. The resolution and image quality is way better than a stereo microscope. Stereo microscopes really aren't suited for photography. Here's a good intro: https://www.photomacrography.net/forum/viewtopic....
by viktor j nilsson
Sat Sep 07, 2019 9:31 pm
Forum: Digital processing
Topic: Photoshop CS6 v Helicon v Zerene,and the rest
Replies: 21
Views: 2081

Re: Photoshop CS6 v Helicon v Zerene,and the rest

Looks promising for sure. But it seems like you lost much of the dynamic range when you converted them to .gif - as seen in the stepped, not smooth, color gradient in the background. Probably better to save them as jpegs.
by viktor j nilsson
Sat Sep 07, 2019 12:17 pm
Forum: Digital processing
Topic: Photoshop CS6 v Helicon v Zerene,and the rest
Replies: 21
Views: 2081

Re: Photoshop CS6 v Helicon v Zerene,and the rest

Stacking very often improves things dramatically, even if you're only using three or four images. That said, you do need to be a bit careful when taking the pictures. If you haven't stacked microscopic subjects before (or any subjects, for that matter) I wouldn't rule out the possibility that your p...
by viktor j nilsson
Thu Sep 05, 2019 8:14 pm
Forum: Pictures and Videos
Topic: Rotifer and some algae
Replies: 12
Views: 1218

Re: Rotifer and some algae

Hej Håkan,
I've admired your work for quite some time. Good to see you post on here as well! Amazing and inspiring photos as always.

Viktor, in Lund
by viktor j nilsson
Wed Sep 04, 2019 6:13 pm
Forum: Microscopy accessories
Topic: Cleaning dirty DIC prisms
Replies: 15
Views: 1099

Re: Cleaning dirty DIC prisms

DIC prisms (Wollaston or Nomarski) are simply two very precisely made wedges of quartz or calcite that are cemented together with some sort of optical cement. Not sure what crystal and cement Zeiss used, though. If it's quartz (hardness: 7), it's really hard and I imagine very hard to damage when cl...
by viktor j nilsson
Sun Sep 01, 2019 3:17 pm
Forum: Specimens, samples and slides
Topic: Potted Bamboo Hand Sectioned
Replies: 30
Views: 2549

Re: Potted Bamboo Hand Sectioned

That is true, but I also mean that stacking algorithm will find and combine the sharp parts, even if they occur in different pictures. So the central parts will be sharp in one picture, and the peripheral parts will be sharp in another picture. Put another way, a lens that isn't plan may be very sha...
by viktor j nilsson
Sun Sep 01, 2019 8:21 am
Forum: Specimens, samples and slides
Topic: Potted Bamboo Hand Sectioned
Replies: 30
Views: 2549

Re: Potted Bamboo Hand Sectioned

Actually, since in most cases you are going to stack the pictures anyway, it might not be a big deal if a 4x isn't plan. The Lomo 3.7x for example is exceptionally sharp and free of CA when used for macro work, but it is far from plan.
by viktor j nilsson
Tue Aug 27, 2019 11:00 pm
Forum: Microscopes and optics
Topic: Nikon Fluor objectives on a Leitz stand
Replies: 34
Views: 4154

Re: Nikon Fluor objectives on a Leitz stand

They can be pretty good value for sure, I got my set of 10x 0.50, 20x 0.75 and 40x 0.85 Nikon Fluor's for $250 (originally $300, but the seller knocked off $50 because the correction collar on the 40x was stuck, which I have since fixed). I also have the 40x 1.30 oil, but paid a bit more for it. All...
by viktor j nilsson
Fri Aug 23, 2019 9:42 pm
Forum: Microscopes and optics
Topic: Nikon Fluor objectives on a Leitz stand
Replies: 34
Views: 4154

Re: Nikon Fluor objectives on a Leitz stand

Did you try to clean it? I once had an objective that looked ok when inspected by eye, but produced an inferior, washed-out image in practice. Turned out the front lens was covered by a thin layer of dried-up immersion oil. After cleaning, it was perfect. A high-NA 40x seems like a prime candidate f...
by viktor j nilsson
Mon Jul 15, 2019 9:31 pm
Forum: Microscopes and optics
Topic: Unbranded NEW 4X Planachromate objective on a Zeiss Standard microscope
Replies: 32
Views: 2441

Re: Unbranded NEW 4X Planachromate objective on a Zeiss Standard microscope

An excellent set of reference images ... Thanks for sharing them. May I just ask: is that Nikon objective designated 'CF' ? ... and could you please post a photo of it, to aid identification. MichaelG. . Edit: if it's like this one ... no photo needed https://www.ebay.com/itm/Nikon-Plan-4X-0-1-160-...
by viktor j nilsson
Sun Jul 14, 2019 6:58 pm
Forum: Microscopes and optics
Topic: Looking for a User's Manual for American Optical Epistar scope.
Replies: 11
Views: 1234

Re: Looking for a User's Manual for American Optical Epistar scope.

Charles Krebs constructed an even simpler setup using a UV flashlight, with really nicely results.

https://www.photomacrography.net/forum/ ... hp?t=33123
by viktor j nilsson
Mon Jul 08, 2019 3:23 pm
Forum: For forum members who want to buy and sell equipment
Topic: WANTED - Olympus 60x dry infinity objective
Replies: 19
Views: 1750

Re: WANTED - Olympus 60x dry infinity objective

Never hurts to put in an offer for whatever you are willing to pay...
by viktor j nilsson
Sat Jul 06, 2019 7:20 pm
Forum: Pictures and Videos
Topic: Achnanthes sp.
Replies: 4
Views: 704

Re: Achnanthes sp.

Spectacular photo!

How do you prepare these samples? Are they simple water mounts? I love seeing them 'fresh' like this.
by viktor j nilsson
Sun Jun 23, 2019 6:12 pm
Forum: For forum members who want to buy and sell equipment
Topic: Wanted: Nikon CF plan apo 60x
Replies: 8
Views: 2390

Re: Wanted: Nikon CF plan apo 60x

As I said, I also have it and give it both my thumbs up. It's quite a spectacular objective, virtually zero false color. A friend has compared it directly to the newer CFN 60x 0.95 version. The CFN apparently has a little higher contrast, but they are very close. Sure, the very best modern infinity ...
by viktor j nilsson
Wed Jun 19, 2019 4:15 pm
Forum: For forum members who want to buy and sell equipment
Topic: Wanted: Nikon CF plan apo 60x
Replies: 8
Views: 2390

Re: Wanted: Nikon CF plan apo 60x

There seems to be one available at dealcorner for $390: https://www.dealcorner.com/Nikon-Objectives/ One sold on auction on eBay in May for $249. I paid a around $225 for mine, but with a bit higher risk. That should give you an indication of what the lowest price you can reasonable expect to get on...
by viktor j nilsson
Fri Jun 14, 2019 4:55 pm
Forum: Beginner's corner
Topic: Why do these two 20x objectives have a price difference?
Replies: 24
Views: 2047

Re: Why do these two 20x objectives have a price difference?

For example, I do not have a 4X objective. Perhaps a cheap 4X, 160mm Plan or PlanF objective might do, especially at at $20-$30. But if the WD is unknown, then what ? Since it's virtually guaranteed that a new Chinese 4x is at least very near 45mm parfocal DIN, then it's easy to see based on a phot...
by viktor j nilsson
Wed Jun 12, 2019 10:21 am
Forum: Illumination Techniques
Topic: dIY DIC
Replies: 29
Views: 3912

Re: dIY DIC

Good point, John. I've been wondering why so few people talk about DIC using a slit condenser. If I've understood it correctly, the plasDIC system is basically a rebranding of the techniques that were already fully described in the very earliest DIY literature. (And implemented, for example, in the....
by viktor j nilsson
Sat Jun 08, 2019 7:55 pm
Forum: Illumination Techniques
Topic: dIY DIC
Replies: 29
Views: 3912

Re: dIY DIC

A while ago I picked up a Nikon optiphot nosepiece that came with 4 epi DIC prisms: 5x, 10/40/100x (2pcs) and 20x prisms. Paid $180 for it. (It also came with 20x and 40x M plan objectives.) I've been experimenting a bit with these prisms on my Wild M20 stand. I still haven't optimized anything: I'v...
by viktor j nilsson
Tue May 07, 2019 9:46 am
Forum: Identification help
Topic: Tiny Caterpillar?
Replies: 2
Views: 894

Re: Tiny Caterpillar?

It's Polyxenus sp.
by viktor j nilsson
Fri Apr 26, 2019 2:17 pm
Forum: Microscopes and optics
Topic: Possible to lubricate iris-equipped objectives?
Replies: 17
Views: 3244

Re: Possible to lubricate iris-equipped objectives?

I'm pleased that worked out for you. Generally, those little seams can't take very much oil at a time anyway, with the excess flooding the surface awaiting removal. The size of the drop that gets absorbed at any one time, is pretty much self limiting. Glad to hear you say that. I re-applied oil to ...
by viktor j nilsson
Fri Mar 01, 2019 8:35 pm
Forum: Microscopes and optics
Topic: A new AO objective design!?
Replies: 13
Views: 1539

Re: A new AO objective design!?

I have a Nikon CF Fluor 10x 0.50 objective where quite a bit of the black paint has come off due to poor packaging by an eBay seller. I got a partial refund, but kept it as the image is really good despite this. If you look through it at an angle, the damage is very obvious. But viewed straight thro...
by viktor j nilsson
Sun Feb 24, 2019 5:11 pm
Forum: For forum members who want to buy and sell equipment
Topic: Looking for Wild Heerbrugg/Leica Photo Eyepiece Adapter 445932
Replies: 4
Views: 1599

Re: Looking for Wild Heerbrugg/Leica Photo Eyepiece Adapter 445932

If you bought it on eBay you definitely will get your money back, just report it as 'not as described'. Did you?
by viktor j nilsson
Fri Feb 01, 2019 1:17 pm
Forum: Beginner's corner
Topic: Picture magnification question?
Replies: 8
Views: 2458

Re: Picture magnification question?

https://www.ebay.com/itm/171573622127

I have one of these that have both a grid and a scale, works very well and costs little.
by viktor j nilsson
Wed Jan 30, 2019 11:33 am
Forum: Off Topic
Topic: Single Cell Microbiology...
Replies: 5
Views: 4073

Re: Single Cell Microbiology...

The name "3D_man" suggests that it might be a 3D rendering, which I think is exactly what it is.
by viktor j nilsson
Sun Jan 27, 2019 6:50 am
Forum: My microscope
Topic: Reichert Zetopan IK
Replies: 13
Views: 5716

Re: Reichert Zetopan IK

As a fellow with Nikon CF objectives on a black vintage microscope stand, I applaud you! What eyepieces do you have on there? A CF PL the trinocular? But the ones in the binocular head don't look like Nikon CF?
by viktor j nilsson
Tue Jan 22, 2019 7:23 pm
Forum: Camera systems and imaging
Topic: reflection in center of FOV
Replies: 43
Views: 10544

Re: reflection in center of FOV

I use Doodlebug Design Crushed Velvet cardstock from scrapbook.com - highly recommended. Better than protostar. Never seen vantablack, but black 2.0, seems to have been a bit of marketing hyperbole.