Search found 136 matches

by ChrisR
Thu Oct 24, 2019 10:41 am
Forum: Microscopy accessories
Topic: Zero Working Distance Objective?
Replies: 5
Views: 417

Re: Zero Working Distance Objective?

If you move "tube" lens too close to the objective, the latter will focus closer, probably as close as the front surface, as a retrofocus optic does. The effect would be more noticeable if you used a finite objective with the same tube lens. Try one with the TL setup you have now? The effect on IQ w...
by ChrisR
Sat May 04, 2019 12:00 pm
Forum: Off Topic
Topic: Windows 10
Replies: 32
Views: 15651

Re: Windows 10

My take is that people used to have problems with Win10, but for various reasons it's not a problem now. If you have a computer stuffed with rubbish and multiple anti-virus programs and "free" junk, then any O/S would give problems. W10 used to need a heck of a lot of updates. Win 7 used to grow - m...
by ChrisR
Fri May 03, 2019 8:25 am
Forum: Microscopes and optics
Topic: Leitz Ortholux fluorescence microscope
Replies: 8
Views: 1268

Re: Leitz Ortholux fluorescence microscope

If it takes the common "bath" shaped condenser, they do come along at low prices, around $30. I also have a non-working power supply, and no bulb, for UV, (Nikon). I think the scare stories about the UV bulbs are rather over hyped; that would be my preferred way to go. Surprisingly (to me), tungsten...
by ChrisR
Mon Apr 22, 2019 3:47 pm
Forum: Introduce yourself
Topic: Hello from Southampton, UK
Replies: 8
Views: 4530

Re: Hello from Southampton, UK

I remember when there were several camera shops in Southampton. One on Bargate Street, one in Commercial Road and one Below Bar. That was before Tecno, LCE and the rest arrived. I suggest you look now at the Quekett Microscopical Society. meetings are dotted about. Recently I drove two folks from Su...
by ChrisR
Thu Apr 18, 2019 10:09 am
Forum: Microscopes and optics
Topic: Double images
Replies: 18
Views: 5734

Re: Double images

Could be, Michael, but I have yet to work out how, as I think I have control over my convergence. :( It's not unique - there are similar tales to be found on the net. Of course those dozen reports could be the only 6 in the world, moaning a lot... I thought I'd try my "new" SMZ again. I've been usin...
by ChrisR
Thu Apr 18, 2019 4:14 am
Forum: Microscopes and optics
Topic: Double images
Replies: 18
Views: 5734

Re: Double images

do I need :
beck.jpg
beck.jpg (40.74 KiB) Viewed 5478 times
?
by ChrisR
Wed Apr 17, 2019 11:17 pm
Forum: Microscopes and optics
Topic: Double images
Replies: 18
Views: 5734

Re: Double images

I don't follow, sorry. :? For binoculars and binocular microscopes, am I looking parallel-eyed and focusing at infinity?
by ChrisR
Mon Apr 15, 2019 11:04 pm
Forum: Microscopes and optics
Topic: Double images
Replies: 18
Views: 5734

Re: Double images

Thanks for all the suggestions! I don't think it's a microscope fault; I tried several at a Quekett meeting. The one which was different was a stereo with a triple lens-pair turret, possibly from the 60's. It was quite "V" shaped, perhaps its focal axes were convergent. If I'm incapable of viewing a...
by ChrisR
Sun Apr 14, 2019 11:52 pm
Forum: Microscopes and optics
Topic: Double images
Replies: 18
Views: 5734

Double images

Does anyone know a way to stop seeing double images when using a binocular microscope? I always see two of everything, displaced sideways. With very low mag stereo microscopes it's OK. I have tried adjusting the interpupillary distance, the eyepiece correction, using my specs and not, and altering t...
by ChrisR
Mon Apr 08, 2019 7:14 pm
Forum: Camera systems and imaging
Topic: Nikon SMZ-2T camera connection
Replies: 22
Views: 4646

Re: Nikon SMZ-2T camera connection

It was where I came in. I might carry this scope about.

I didn't think of proper(!) cameras being so low priced, or compact.

Yes it's a pity Nikon's 1" sensor cameras were... what they were.

Which of the later Olympi have a better shutter - on the Mercalli scale? I guess the price leaps.
by ChrisR
Mon Apr 08, 2019 1:45 pm
Forum: Camera systems and imaging
Topic: Nikon SMZ-2T camera connection
Replies: 22
Views: 4646

Re: Nikon SMZ-2T camera connection

Sorry I'd missed a few posts.
Thanks for the info.
That Olympus looks pretty good. I have a Canon 700D/t5i "spare" but
I was thinking of something smaller, like this:
digicam.jpg
digicam.jpg (44.43 KiB) Viewed 4416 times
But the Oly has advantages. There have been some cheap ones on ebay.
by ChrisR
Sat Apr 06, 2019 5:56 pm
Forum: Pictures and Videos
Topic: Re: BEST COFFEE MAKER WITH K CUP OPTION
Replies: 4
Views: 1487

Re: BEST COFFEE MAKER WITH K CUP OPTION

Every post that is not about microscopy is a win for the trolls/spammers. Best to not feed them. Spammers post has been reported. I think I just Reported your post by mistake :oops: Terribly sorry! :shock: :? :( :oops: I doubt they'll ban you though :o :o :lol: I apologize, Mr administrator, perhap...
by ChrisR
Thu Apr 04, 2019 8:04 pm
Forum: Beginner's corner
Topic: Choosing Stereo Scope over Microscope
Replies: 16
Views: 2989

Re: Choosing Stereo Scope over Microscope

Agree with all, especially, as of late, - There are smartphone-eyepiece adapters availabe that offer really good image quality with a better smartphone, acceptable image quality with a cheap one. - Many smartphone offer a way to connect to a display or computer wirelessly (forgot the name of the sys...
by ChrisR
Wed Apr 03, 2019 11:37 pm
Forum: Camera systems and imaging
Topic: Nikon SMZ-2T camera connection
Replies: 22
Views: 4646

Re: Nikon SMZ-2T camera connection

A used G1 might make a good choice, even if they are a bit bulkier.
Do they have a fully electronic shutter, or electronic "front shutter curtain"?
by ChrisR
Wed Apr 03, 2019 11:30 pm
Forum: Camera systems and imaging
Topic: Nikon SMZ-2T camera connection
Replies: 22
Views: 4646

Re: Nikon SMZ-2T camera connection

Sorry MG,I've tried to post this twice, once several hours ago... "invalid" it says...??? I didn't reaise it hadn't gone a female c-mount can be recessed into the throat of a Micro 4/3 mount The male you mean? Ah ok, I see. I wonder what the working distance of that Nikon 1-2x adapter is. It might b...
by ChrisR
Wed Apr 03, 2019 8:23 pm
Forum: Camera systems and imaging
Topic: Nikon SMZ-2T camera connection
Replies: 22
Views: 4646

Re: Nikon SMZ-2T camera connection

The bung which is a good fit, also fits an Optiphot trinoc hole. Which I guess means it's 38mm. The round bung actually measures 39 point something. As Pau said on the other thread, modern cameras have such tiny sensors.... even 0.5 would mean a crop. Why doesn't everyone moan?? I'm still missing so...
by ChrisR
Wed Apr 03, 2019 2:22 pm
Forum: Camera systems and imaging
Topic: Nikon SMZ-2T camera connection
Replies: 22
Views: 4646

Re: Nikon SMZ-2T camera connection

I didn't know it was originally for 16mm ;) , but what we have is a 2.5x projective works for 24x36, so , having half the diameter, would mean . a 1.25x would suit 4/3rds. But there isn't one, and the flange focal distance for C-mount lenses (if there is such a thing as a constant between the format...
by ChrisR
Wed Apr 03, 2019 11:29 am
Forum: Camera systems and imaging
Topic: Nikon SMZ-2T camera connection
Replies: 22
Views: 4646

Nikon SMZ-2T camera connection

I recently posted a similar query on photomacrography.net, but some folk don't visit both forums. I have one of these stereos with the photo/trinoc tube. (If anyone has/can point me to pdf manuals I'd be very grateful) What do Ineed to connect a small digital camera to it without cropping ? The syst...
by ChrisR
Mon Apr 01, 2019 9:31 pm
Forum: Illumination Techniques
Topic: Dark-field white sugar
Replies: 14
Views: 4577

Re: Dark-field white sugar

Are you suggesting that the human cognition was anything more than to use what was available at the time, or just using what worked for particular pots?
by ChrisR
Fri Mar 22, 2019 10:25 am
Forum: Off Topic
Topic: Magnifying Glass
Replies: 6
Views: 2978

Re: Magnifying Glass

For school we use a number of the Chinese cheap magnifiers, many with LEDs built in, for a couple of bucks. Most of them are absolutely fine. Some are glass doublet or triplet. Be aware that "magnification" has a variable meaning, as far as vendors are concerned. Some work on area, so what you thoug...
by ChrisR
Fri Mar 08, 2019 1:36 am
Forum: For forum members who want to buy and sell equipment
Topic: Leica DMIL, lots of micromanipulation gear, over 10K in objectives
Replies: 12
Views: 2608

Re: Leica DMIL, lots of micromanipulation gear, over 10K in objectives

Saying " as is...no returns." means nothing. If you haven't disclosed a fault, you have to take the return.
There is no such thing as an "as is" listing.
Yes I've tested it, and won. Ebay rules, rule.
by ChrisR
Fri Mar 08, 2019 1:33 am
Forum: Microscopes and optics
Topic: 160/-, planaapo low mag. objectives...please advise?
Replies: 11
Views: 1468

Re: 160/-, planaapo low mag. objectives...please advise?

Darn it.. I posted earlier , I thought, but it's not here. At NA 0.4 you're on the cusp of significance The question is answered in a current thread in the other place : http://www.photomacrography.net/forum/viewtopic.php?t=34610 Thorlabs graph: https://www.thorlabs.com/images/tabimages/Objective_Co...
by ChrisR
Thu Mar 07, 2019 4:37 pm
Forum: Microscopes and optics
Topic: 100x NCG oil: what is it used for?
Replies: 5
Views: 1080

Re: 100x NCG oil: what is it used for?

Blood smears?
I have a Nikon 40 NCG (dry)which I had some reason to believe was for blood.
A path lab might use oil objectives for diagnosis where they don't need to keep the slide?
by ChrisR
Thu Mar 07, 2019 12:55 am
Forum: Illumination Techniques
Topic: Darkfield photography
Replies: 28
Views: 9112

Re: Darkfield photography

It's worth mentioning that the 60D disappointed a lot of high mag micro folk because it DOES vibrate when the electronic first shutter curtain "opens". My 80D does it too, though I think somewhat less. If a continuous light exposure is long enough (say 2secs + ) then the vibration is only a small pa...
by ChrisR
Tue Mar 05, 2019 12:15 am
Forum: For forum members who want to buy and sell equipment
Topic: Leica DMIL, lots of micromanipulation gear, over 10K in objectives
Replies: 12
Views: 2608

Re: Leica DMIL, lots of micromanipulation gear, over 10K in objectives

I bought a Leitz manipulator like the one on the right in the second pic, $125, after it hadn't sold for a while. I don't know what they cost new but it seemed a good price. I'll think of a use for it, one day!
by ChrisR
Sat Mar 02, 2019 11:35 pm
Forum: Beginner's corner
Topic: DIY polarizing
Replies: 25
Views: 9205

Re: DIY polarizing

The advantage here is that circular polarizers, complete with metal rings and threads, are now available for a few bucks each. Exactly. Bottom line, use whatever you have or can get in good enough quality, cheapest. If it turns out to be a circular polarizer, which you can check for free in a mirro...
by ChrisR
Fri Mar 01, 2019 8:57 pm
Forum: Digital processing
Topic: 3D image?
Replies: 4
Views: 6261

Re: 3D image?

Somehow I learned to diverge my eyes so I can see it too, but it's quite a lot more difficult.
Rik Littlefield (wrote Zerene stacker & does talks) says hardly anyone can use the crossed-eye method and even fewer uncrossed eyes. I think it must be practice, - or motivation!
by ChrisR
Fri Mar 01, 2019 7:18 pm
Forum: Digital processing
Topic: 3D image?
Replies: 4
Views: 6261

Re: 3D image?

You have the left and right the wrong way round if you want to use the crossed-eye method.
I find it "works" when they're swapped, but there are quite big differences between the images so it isn't quite as effective as it could be. Keep trying!
by ChrisR
Fri Mar 01, 2019 12:39 am
Forum: Microscopes and optics
Topic: A new AO objective design!?
Replies: 13
Views: 1495

Re: A new AO objective design!?

Concave yes, but I'd never noticed any dimples!
by ChrisR
Fri Mar 01, 2019 12:35 am
Forum: Pictures and Videos
Topic: Hair in POL
Replies: 1
Views: 1029

Re: Hair in POL

Try wool, cotton, nylon etc ;)