Search found 163 matches

by viktor j nilsson
Fri Jul 10, 2020 12:16 pm
Forum: Microscopes and optics
Topic: Comparison of AmScope's Plan & Non-Plan Objectives
Replies: 16
Views: 181

Re: Comparison of AmScope's Plan & Non-Plan Objectives

I do agree that the soft edges looks like vignetting rather than the sharp edge of the field stop, suggesting that we are not seeing the full field of view. When you sort it out, it will be very interesting to see this comparison. May I also suggest that you crop just outside the field of view and p...
by viktor j nilsson
Fri Jul 10, 2020 5:55 am
Forum: For forum members who want to buy and sell equipment
Topic: WTB: Olympus short-barrel PlanApo 40x and 100x
Replies: 5
Views: 193

Re: WTB: Olympus short-barrel PlanApo 40x and 100x

Thanks for the offer, Micro. However, I think that shipping+taxes would make it too expensive in the end. I'd be willing to eat that if I find a PlanApo, but not the Fluorite, sorry.
by viktor j nilsson
Sun Jul 05, 2020 9:19 am
Forum: Camera systems and imaging
Topic: Help needed to design adaptor for Mirrorless camera
Replies: 20
Views: 1408

Re: Help needed to design adaptor for Mirrorless camera

Parfocality really is the most reliable way to tell if your sensor is located exactly at the intermediate image. I would setup your camera on a tripod and adjust its position until you found the exact position where everything is parfocal. Then make an adapter that will put your camera there. It mig...
by viktor j nilsson
Tue Jun 30, 2020 11:19 am
Forum: Beginner's corner
Topic: Is this Leitz SM LUX any good?
Replies: 20
Views: 457

Re: Is this Leitz SM LUX any good?

Sounds like a good buy, I am sure you are going to like it. You might want to keep an eye out for an affordable trinocular head anyway, which would make the binocular head redundant as well.
by viktor j nilsson
Tue Jun 30, 2020 7:41 am
Forum: Microscopes and optics
Topic: Best DIC options?
Replies: 57
Views: 1422

Re: Best DIC options?

I think the best strategy is almost always to buy whatever DIC equipment you can find at a price you are able to pay, and then buy whatever scope you need to use it. Microscope stands are cheap. This probably applies even more to Leitz, where you almost never find any DIC parts.
by viktor j nilsson
Tue Jun 30, 2020 7:22 am
Forum: For forum members who want to buy and sell equipment
Topic: WTB: Olympus short-barrel PlanApo 40x and 100x
Replies: 5
Views: 193

Re: WTB: Olympus short-barrel PlanApo 40x and 100x

Congratulations on that scope. It is extremely heavy, but ergonomic. BTW, I am quite certain that long barrel objectives can be used on it - at least for brightfield, do not know about other modes of illumination. Thank you! And it is indeed very, very stable to say the least. Eventually, I hope to...
by viktor j nilsson
Tue Jun 30, 2020 6:54 am
Forum: For forum members who want to buy and sell equipment
Topic: WTB: Olympus short-barrel PlanApo 40x and 100x
Replies: 5
Views: 193

WTB: Olympus short-barrel PlanApo 40x and 100x

Hello, Does anyone have any Olympus short-barrel Plan Apo objectives to sell or trade? I am specifically looking for the 40x 0.95 and the 100x 1.30. Might also be tempted by a 4x or a 20x, but I only have DIC prisms for 10x, 40x and 100x and I've already found a 10x. SB PA.jpg Preferably in Europe. ...
by viktor j nilsson
Mon Jun 29, 2020 10:48 am
Forum: Microscopes and optics
Topic: Best DIC options?
Replies: 57
Views: 1422

Re: Best DIC options?

One somewhat confusing - and poorly documented - aspect of the Nikon DIC system is that only some versions of the Optiphot stand can accommodate the DIC intermediate tube. The stand needs to have a rectangular cutout immediately behind the nosepiece. I may be wrong, Viktor, but I believe the Optiph...
by viktor j nilsson
Sun Jun 28, 2020 5:49 am
Forum: Microscopes and optics
Topic: Best DIC options?
Replies: 57
Views: 1422

Re: Best DIC options?

One somewhat confusing - and poorly documented - aspect of the Nikon DIC system is that only some versions of the Optiphot stand can accommodate the DIC intermediate tube. The stand needs to have a rectangular cutout immediately behind the nosepiece.
by viktor j nilsson
Sat Jun 27, 2020 8:22 am
Forum: Illumination Techniques
Topic: Epi DIC woes
Replies: 44
Views: 2150

Re: Epi DIC woes

I do notice when using epi illumination that when things move out of focus they seem to split as they blur. Not sure what's up with that but it doesn't affect normal picture taking. I noticed a very similar effect in the beginning when I was messing around with diy transmitted DIC with two identica...
by viktor j nilsson
Mon Jun 22, 2020 7:25 am
Forum: Camera systems and imaging
Topic: Microstar IV Camera Setup
Replies: 15
Views: 535

Re: Microstar IV Camera Setup

In fact, if I read the post right, the 3D printed part was destroyed in the mail, so the eyepiece is held by cardboard. So there is one issue: the eyepiece may not be properly aligned. However, I am still worried about the height of your afocal setup. Afocal setup are almost always more compact that...
by viktor j nilsson
Wed Jun 17, 2020 11:49 am
Forum: For forum members who want to buy and sell equipment
Topic: Zeiss Universal-gone
Replies: 7
Views: 710

Re: Zeiss Universal

I recently adjusted these on a Zeiss Fluoro condenser from this era. I didn't think that I used very much force, but I still managed to split both of the two retaining screws when I tried to unscrew them. So be aware that these are quite brittle. Might be wise to heat or lubricate them a bit first. ...
by viktor j nilsson
Tue Jun 16, 2020 8:44 am
Forum: Pictures and Videos
Topic: Features on the Head of a Dandilion
Replies: 6
Views: 494

Re: Features on the Head of a Dandilion

I believe Don wants his images to look that way. Several people have tried to help him get sharper images without compression artifacts, but he has kindly turned down all offers of help. It's a unique style, for sure!
by viktor j nilsson
Sun Jun 14, 2020 10:12 pm
Forum: Microscopes and optics
Topic: Wave plates on Ebay
Replies: 6
Views: 364

Re: Wave plates on Ebay

https://www.ebay.com/itm/274396219802

Could this be the one you got? Different seller, suspiciously similar name!
by viktor j nilsson
Tue Jun 09, 2020 9:50 pm
Forum: For forum members who want to buy and sell equipment
Topic: Nikon E600 DIC, Pola scope soon for sale
Replies: 7
Views: 354

Re: Nikon E600 DIC, Pola scope soon for sale

A couple messages wondered if it would be possible to sell the DIC components, without the stand and objectives, to someone who already has a Nikon E400, E600, or E800? For the E600 and E800, I'd consider it. Easier to carefully and safely pack and ship. The E400, however, has a fixed nosepiece and...
by viktor j nilsson
Mon Jun 08, 2020 11:50 am
Forum: Beginner's corner
Topic: Pol/DIC
Replies: 5
Views: 211

Re: Pol/DIC

Here's a good thread: https://www.photomacrography.net/forum/viewtopic.php?t=31435&postdays=0&postorder=asc&start=0 If you are using matched objective and condenser prisms on the correct stand, and objectives from the same manufacturer, then you are a lot closer to what the manufacturer intended tha...
by viktor j nilsson
Mon Jun 08, 2020 11:46 am
Forum: Beginner's corner
Topic: Pol/DIC
Replies: 5
Views: 211

Re: Pol/DIC

I can't say that for sure. DIC compatibility is determined by several factors, in particular objective focal length and location of back focal plane. Objectives with the same magnification from the same manufacturer will typically have the same focal length and the back focal plane will often, but n...
by viktor j nilsson
Mon Jun 08, 2020 11:00 am
Forum: Beginner's corner
Topic: Pol/DIC
Replies: 5
Views: 211

Re: Pol/DIC

Pol objectives have been checked by the manufacturer to make sure that they are strain-free. This means that the objective doesn't affect the polarization state of the transmitted light. Since both DIC and polarization microscopy rely on polarized light, both techniques need objectives that are stra...
by viktor j nilsson
Sat Jun 06, 2020 5:07 am
Forum: Microscopes and optics
Topic: Cutting dichroic mirrors with hole saw - help needed!
Replies: 16
Views: 497

Re: Cutting dichroic mirrors with hole saw - help needed!

Yes, the old Zeiss fluoro condenser uses 22mm round dichroic mirrors, and 18mm round excitation and emission filters.
by viktor j nilsson
Fri Jun 05, 2020 10:23 pm
Forum: Microscopes and optics
Topic: Cutting dichroic mirrors with hole saw - help needed!
Replies: 16
Views: 497

Re: Cutting dichroic mirrors with hole saw - help needed!

I've never been able to make good, clean cuts with the glass cutter. I didn't know about the settling time - maybe I've been working too slow. In any case, I feel more comfortable with the hole saw approach. Grinding could still be an option though, especially if I end up needing to reduce a 22mm di...
by viktor j nilsson
Fri Jun 05, 2020 2:04 pm
Forum: Microscopes and optics
Topic: Cutting dichroic mirrors with hole saw - help needed!
Replies: 16
Views: 497

Re: Cutting dichroic mirrors with hole saw - help needed!

Hi Viktor, instead of drilling with a hole saw you could remove the corners by grinding from the outside. In my view this would introduce less strain in the glass. I have bought the same set of dichroic filters for my Zeiss RS III epic fluo condenser. Bob Yes, I am grateful that you pointed these o...
by viktor j nilsson
Fri Jun 05, 2020 7:04 am
Forum: Microscopes and optics
Topic: Cutting dichroic mirrors with hole saw - help needed!
Replies: 16
Views: 497

Re: Cutting dichroic mirrors with hole saw - help needed!

One more question to you, Hobbyst46. How did you dry and clean the dichroic mirror after cutting? If air drying, am sure that there will be at least some streaking from the water? And in general, what is a safe method to clean DMs?
by viktor j nilsson
Fri Jun 05, 2020 7:02 am
Forum: Microscopes and optics
Topic: Cutting dichroic mirrors with hole saw - help needed!
Replies: 16
Views: 497

Re: Cutting dichroic mirrors with hole saw - help needed!

Viktor, So I quickly surfed through your post on the photomacrography.net. Interesting. As Pau comments, your set of interference filters is a steal. Such filters, each one and new, are expensive. I like it that you got both long pass and shortpass filters. Very useful ! The fried filters must have...
by viktor j nilsson
Thu Jun 04, 2020 11:09 am
Forum: Microscopes and optics
Topic: Cutting dichroic mirrors with hole saw - help needed!
Replies: 16
Views: 497

Re: Cutting dichroic mirrors with hole saw - help needed!

Thank you! I now have a much clearer image in my mind of what I need to do. I'm in no hurry, but I am starting to feel confident that this is what I'll end up doing. I'll definately practice on some scrap camera filters first. I recently started a thread over at photomacrography.net where I chronicl...
by viktor j nilsson
Thu Jun 04, 2020 10:44 am
Forum: Microscopes and optics
Topic: Cutting dichroic mirrors with hole saw - help needed!
Replies: 16
Views: 497

Cutting dichroic mirrors with hole saw - help needed!

In an earlier thread, Hobbys46 reported success in cutting dichroic mirrors with a diamond hole saw: http://www.microbehunter.com/microscopy-forum/viewtopic.php?p=72470&sid=76f1142f5f6aa4f98eb823f8595a701a#p72470 I have a rather large rectangular Chroma Chroma T400LP beamsplitter (25.5x36mm) that I ...
by viktor j nilsson
Wed Jun 03, 2020 9:52 am
Forum: Pictures and Videos
Topic: Fresh water diatoms
Replies: 19
Views: 905

Re: Fresh water diatoms

Everything does not need to be stacked front to back... nor is it possible in many cases. The rotifer with flash shots you mention are a good example. In many of those the subject is in constant motion and changing its position and shape rapidly. There is no chance to acquire a stack, so you just t...