Search found 2713 matches

by zzffnn
Sat Feb 23, 2019 10:03 pm
Forum: Introduce yourself
Topic: Hello from Toronto
Replies: 8
Views: 3344

Re: Hello from Toronto

I would suggest using UV LED, instead of HBO (I don't know how to maintain HBO lamps). "search all words" "LED fluorescence" at http://www.photomacrography.net/forum/search.php?mode=results Here is an example thread: http://www.photomacrography.net/forum/viewtopic.php?t=32736&postdays=0&postorder=as...
by zzffnn
Sat Feb 23, 2019 7:48 pm
Forum: Introduce yourself
Topic: Hello from Toronto
Replies: 8
Views: 3344

Re: Hello from Toronto

Welcome to the forum, wjuanxp! I would be surprised to see a hobbyist with a mass spec at home. But you may rent user time from an electron microscope from some major universities. Member Robert Berdan from Calgary may have done that or is going to do so. For a 3yo, I would suggest a dissecting macr...
by zzffnn
Fri Feb 22, 2019 3:06 pm
Forum: Introduce yourself
Topic: Hello from Portland, Oregon, USA
Replies: 7
Views: 3519

Re: Hello from Portland, Oregon, USA

Welcome fiddlercrab! I used to be a bench microbiologist, but am moving back to health care (I did BS in pharmacy and PhD in microbiology and immunology). I don't think you can make true 3D videos from regualr microscopes. Inverted scopes actually do not have obvious advantage in 1) viewing live sam...
by zzffnn
Thu Feb 21, 2019 5:51 am
Forum: For forum members who want to buy and sell equipment
Topic: Where to buy a drop stop ring (?) for a pole-mounted microscope
Replies: 16
Views: 2446

Re: Where to buy a drop stop ring (?) for a pole-mounted microscope

You may be able to find a suitable clamp from a hardware store, such as Home Depot. Which type or model would depend on pole diameter (take the pole with you to shop for clamps, if you can). Sorry, I cannot remember what those "clamps" are called exactly.
by zzffnn
Fri Feb 15, 2019 1:51 pm
Forum: My microscope
Topic: Wild M8
Replies: 31
Views: 13154

Re: Wild M8

Thank you very much, jfiresto. Your comments are helpful to me. And welcome to the forum!
by zzffnn
Fri Feb 15, 2019 4:35 am
Forum: Off Topic
Topic: A great documentary streaming service
Replies: 5
Views: 9045

A great documentary streaming service

I just found a great nature/science/history/culture/travel documentary streaming service called Curiosity Stream. I signed up today, watched a documentary about President Abraham Lincoln's life with my sons and we all love it VERY much. Only $20 PER YEAR for today (one can cancel anytime). I heard t...
by zzffnn
Tue Feb 12, 2019 3:00 pm
Forum: Beginner's corner
Topic: Is a eyepiece and an objective enough for a microscope ?
Replies: 19
Views: 5476

Re: Is a eyepiece and an objective enough for a microscope ?

@Prime, It depends on the magnification you want to achieve and your subjects (opaque insects or transparent protists?). For around 100-200x total visual magnification or about 10x-20x on camera sensor, you may get by with a cheap focus drive and no special illumination. Anything above 200x will req...
by zzffnn
Sat Feb 09, 2019 3:49 pm
Forum: Beginner's corner
Topic: Zeiss Universal - I think - Lot's of Questions
Replies: 25
Views: 6058

Re: Zeiss Universal - I think - Lot's of Questions

William, I have considered E-M1 II, but decided to get Panasonic G9 instead (though am still saving up for it). On a microscope, there is minimal difference between the two, though G9 is bigger. For field macro, G9 has a much faster (~2 seconds 60 frames) post focus (bracketing) mode by using 6k pho...
by zzffnn
Sat Feb 09, 2019 6:41 am
Forum: Beginner's corner
Topic: Zeiss Universal - I think - Lot's of Questions
Replies: 25
Views: 6058

Re: Zeiss Universal - I think - Lot's of Questions

Do you have an eBay page for that good San Antonio scope dealer, Kurt or William?
by zzffnn
Sat Feb 09, 2019 6:36 am
Forum: Beginner's corner
Topic: Zeiss Universal - I think - Lot's of Questions
Replies: 25
Views: 6058

Re: Zeiss Universal - I think - Lot's of Questions

Wow, your macro photos are amazing, William! I especially like your lady beetle photos. Beautiful light. Please tell me your (secret?) diffusers, when we get in touch with emails. So sorry to hear your loss to Harvey. We almost got flooded. Do you still have Olympus E-M1? That may work well on micro...
by zzffnn
Fri Feb 08, 2019 4:52 pm
Forum: Microscopes and optics
Topic: What's this scale?
Replies: 9
Views: 1546

Re: What's this scale?

Wim,

I added M4 nuts and switched to longer M4 screw to raise up the stage. That does not require any change to stage holder and will work on Optiphot 1 and Labophot 2. You would understand, if you read the thread that I linked to.

Best,
Fan
by zzffnn
Fri Feb 08, 2019 3:59 pm
Forum: Microscopes and optics
Topic: What's this scale?
Replies: 9
Views: 1546

Re: What's this scale?

I moved from Labophot 2 to Optiphot 1. I don't know exactly why (don't have manual that explains it), but Apochronaut 's comment makes sense to me. I am using 33mm parfocal LOMO objectives on my Optiphot. I use long M4 and M4 nuts to raise us my stage 12mm: http://www.photomacrography.net/forum/view...
by zzffnn
Fri Feb 08, 2019 2:30 pm
Forum: Beginner's corner
Topic: Zeiss Universal - I think - Lot's of Questions
Replies: 25
Views: 6058

Re: Zeiss Universal - I think - Lot's of Questions

Welcome to the forum, William. Glad to see another macro/microphotographer from Houston! Have you searched/asked at the other forum? There are quite some Zeiss DIC owners there: http://www.photomacrography.net/forum/viewtopic.php?p=182113 Check for delamination very carefully. Phase contrast objecti...
by zzffnn
Tue Feb 05, 2019 4:47 am
Forum: Pictures and Videos
Topic: Hydra: Nature's Lava Lamp
Replies: 5
Views: 1361

Re: Hydra: Nature's Lava Lamp

Fascinating, Kurt! Your photos keep getting better too. You inspired me to read about hydra on wiki and found that they do not age and can regenerate heads or arms. Wow! Do you happen to know how soon a hydra can grow back its head or arms, if you cut one in half? I a guessing the injured halves wil...
by zzffnn
Sat Feb 02, 2019 11:21 pm
Forum: Microscopes and optics
Topic: Are cheap 100x objectives any good?
Replies: 33
Views: 4295

Re: Are cheap 100x objectives any good?

Hobbyst46, I don't disagree with you. It is safer to avoid high magnification objectives, unless teacher has full control or children are very disciplined. I noticed, with my 8 year old son, sometimes he would do exactly what I told him not to do, again and again :evil: Things like don't hang his bo...
by zzffnn
Sat Feb 02, 2019 11:14 pm
Forum: Microscopy accessories
Topic: 3D print CH2-FH Filter Mount for CH2-DS Darkfield Central Stop on Olympus CH-2
Replies: 2
Views: 2919

Re: 3D print CH2-FH Filter Mount for CH2-DS Darkfield Central Stop on Olympus CH-2

For objective less powerful than 40x NA 0.65, you don't have to have precise darkfield diameter. You cna try different coins or even Blutak dots, for example. Centering of filter is more important.
by zzffnn
Sat Feb 02, 2019 8:04 pm
Forum: Microscopes and optics
Topic: Are cheap 100x objectives any good?
Replies: 33
Views: 4295

Re: Are cheap 100x objectives any good?

ChrisR, I think your application would be served reasonably well by cheap 100x NA 1.25 oil objectives. Many amateurs do not mind CA or SA that much, especially when used with regular brightfield and stained slides. Depending on the 60x NA 0.85 objectives, some may not have much longer working distan...
by zzffnn
Wed Jan 30, 2019 9:57 pm
Forum: Illumination Techniques
Topic: Bought Some Condenser Stops on Ebay
Replies: 9
Views: 3923

Re: Bought Some Condenser Stops on Ebay

Putting filters at condenser iris is ideal, but not always niece. Directly at condenser bottom is good enough. Centration is not always necessary, unless one needs darkfield. I usually use mounting putty and microscope slide to hold filters. I would putty the filter to slide, then putty slide to con...
by zzffnn
Wed Jan 30, 2019 7:32 pm
Forum: Illumination Techniques
Topic: Bought Some Condenser Stops on Ebay
Replies: 9
Views: 3923

Re: Bought Some Condenser Stops on Ebay

Rick,

I guess it depends on your interest. For stained slides, you may prefer less contrast offered by shadows, so stops #1, #3, #10 and #10 may work better than #6 and #9.

I know I would prefer to use #6 and #9 for transparent subject, becuase produce more shadow and contrast.
by zzffnn
Wed Jan 30, 2019 6:44 pm
Forum: Illumination Techniques
Topic: Bought Some Condenser Stops on Ebay
Replies: 9
Views: 3923

Re: Bought Some Condenser Stops on Ebay

Rick, Please kindly let me know how well stop #8 and #11 works (if you number them according your photo above, firstly from left to right and then top to bottom). I have bought lots of filter stops from that eBay seller. Great guy. He even custom-made some filters for me for specific diameters. Of t...
by zzffnn
Wed Jan 30, 2019 6:12 pm
Forum: Microscopes and optics
Topic: AO Series 10 questions
Replies: 1
Views: 974

Re: AO Series 10 questions

Welcome to the forum. I used to have what looks like an AO "218F" condenser. I listed all I know about it in the following forum thread. It has to he oiled to slide bottom and works best with objective NA of 0.50 (20x) to 1.0. At 10x NA 0.25 objective, you will see a bright right on periphery of vie...
by zzffnn
Tue Jan 29, 2019 1:05 pm
Forum: Collecting microscopes and slides
Topic: Swift FM-31 field microscope
Replies: 45
Views: 20621

Re: Swift FM-31 field microscope

Here is a link to the two types of Goren microscope: Polarization and "biological". They are both binocular. https://www.mrclab.com/productsList.aspx?search_query=goren I want one, but don't like the fact that no retail price and only one photo is provided. It would be expensive, if they price it b...
by zzffnn
Sun Jan 27, 2019 2:42 pm
Forum: Pictures and Videos
Topic: Hydra and Bosmina = Gulp and Burp
Replies: 19
Views: 3568

Re: Hydra and Bosmina = Gulp and Burp

Bob, I have thought about both approaches carefully. I think you will get better image quality, ergonomics and convenience with a camera + (DIY) macro lens. Have you tried Raynox DCR-150 and/or DCR-250 stacked on a telephoto lens? This web site provides a calculator for you to calculate on-sensor ma...
by zzffnn
Sat Jan 26, 2019 5:59 pm
Forum: Collecting microscopes and slides
Topic: Antique Spencer Lens Company 4mm Apo N.A. 0.95 Objective
Replies: 8
Views: 4359

Re: Antique Spencer Lens Company 4mm Apo N.A. 0.95 Objective

PeteM, I don't have Spencer apo, but paid about $100-$120 for my LOMO apo 40x 0.95. Zeiss / LOMO versions are prone to delamination, so I did not have many options for good copies. That NA 0.95 will help, if you are stacking diatoms or other highly detailed subjectives that demands high resolution. ...
by zzffnn
Sat Jan 26, 2019 5:29 pm
Forum: Pictures and Videos
Topic: Hydra and Bosmina = Gulp and Burp
Replies: 19
Views: 3568

Re: Hydra and Bosmina = Gulp and Burp

What f stop did you use for those nice photos, Kurt? Flash? Manual or auto focus?
by zzffnn
Sat Jan 26, 2019 4:40 am
Forum: Pictures and Videos
Topic: Hydra and Bosmina = Gulp and Burp
Replies: 19
Views: 3568

Re: Hydra and Bosmina = Gulp and Burp

Fascinating, thank you for sharing, Kurt!
by zzffnn
Fri Jan 25, 2019 5:29 am
Forum: Illumination Techniques
Topic: Nikon epi-illuminator - now what?
Replies: 12
Views: 5042

Re: Nikon epi-illuminator - now what?

Mike, the Nikon microscope guy, over at that forum, may offer you some answers on the Nikon epi illumator. I cannot remember his last name (Michell or Mitel?) or email, though he may have a Nikon epi scope.
by zzffnn
Wed Jan 23, 2019 4:05 am
Forum: Beginner's corner
Topic: New Lomo Microscope - need further information
Replies: 26
Views: 8261

Re: New Lomo Microscope - need further information

The 3.7x NA 0.11 objective, or at least one version of it, has been tested and considered to be very good for macrophotography. You don't need eyepiece compensation for it and it provides a large well corrected image circle to cover at least APSC sensor at 150mm objective shoulder to sensor distance...
by zzffnn
Fri Jan 18, 2019 5:43 pm
Forum: Collecting microscopes and slides
Topic: Swift FM-31 field microscope
Replies: 45
Views: 20621

Re: Swift FM-31 field microscope

Adding "an integrated camera" may make the portable scope heavier, even though it may shrink its length? HERO4 or 5 Session may work that way?

I would personally prefer to have a traditional visual eyepiece + adapter for camera, as I don't usually photograph anything from field microscope.
by zzffnn
Fri Jan 18, 2019 1:31 am
Forum: Collecting microscopes and slides
Topic: Swift FM-31 field microscope
Replies: 45
Views: 20621

Re: Swift FM-31 field microscope

Beautiful DIY work, Bob!

How do you mount the condenser (which seems to be a DIY)?

And is the neck part a DIY as well? By "neck part", I meant the part that connects head and objective turret to the black vertical rail/bar.