Search found 216 matches

by Chris Dee
Thu Apr 16, 2020 3:53 am
Forum: My microscope
Topic: Brinkmann
Replies: 9
Views: 6772

Re: Brinkmann

Looks like a very sturdy scope. Congratulations on taking the plunge and disassembling/cleaning the secondary optic. Generations of tobacco smoke, dust, and skin oils make their way into the most unlikely places.
by Chris Dee
Mon Apr 13, 2020 3:02 pm
Forum: Identification help
Topic: Odd structure, any ideas?
Replies: 5
Views: 2291

Re: Odd structure, any ideas?

Didn't expected there to be more than one possible candidate with this shape :shock: I did collect some root mass from a lilly populated pond, and the more irregular limb distribution of Astrosclereid could be a closer match. I'll do a stacked image when I spot another.
by Chris Dee
Mon Apr 13, 2020 1:38 pm
Forum: Identification help
Topic: Odd structure, any ideas?
Replies: 5
Views: 2291

Re: Odd structure, any ideas?

Puzzle solved, thanks 75RR. 8-)
by Chris Dee
Mon Apr 13, 2020 12:34 pm
Forum: Identification help
Topic: Odd structure, any ideas?
Replies: 5
Views: 2291

Odd structure, any ideas?

Seen quite a few of these in samples from bottom of my critter tank. Glass-like hollow shells with multiple crooked limbs, anyone else encountered them?
IMG_5405.jpg
IMG_5405.jpg (117.39 KiB) Viewed 2291 times
by Chris Dee
Sat Apr 11, 2020 1:40 pm
Forum: For forum members who want to buy and sell equipment
Topic: MANY Objective lenses available for sale - Barn Find
Replies: 13
Views: 5307

Re: MANY Objective lenses available for sale - Barn Find

Just another eBay Hawker, overpriced to boot. Whatever you may think, for those looking for a nice used Carl Zeiss Photomicroscope iii he has had some nice deals. https://www.ebay.co.uk/itm/Carl-Zeiss-Photomicroscope-/254521986500?hash=item3b42b14dc4 BUT he is an EBAY Seller and been so since 2006,...
by Chris Dee
Mon Apr 06, 2020 5:41 pm
Forum: Beginner's corner
Topic: Lomo microscope
Replies: 9
Views: 3406

Re: Lomo microscope

Possibly a Lomo Metam 21. If not try searching for 'Lomo inverted microscope', better yet post a picture. :)
by Chris Dee
Sat Apr 04, 2020 1:10 pm
Forum: Pictures and Videos
Topic: Coleochaete algae with zoospores
Replies: 4
Views: 2092

Re: Botryococcus braunii

Thanks for the zoospore suggestion 75RR, I had no idea they could move that fast until looking into it following your post. The sample is deformed but I agree it doesn't share the form of the example of Botryococcus braunii you posted. I need to get a better sample and study further, but it is looki...
by Chris Dee
Fri Apr 03, 2020 8:50 pm
Forum: Pictures and Videos
Topic: Coleochaete algae with zoospores
Replies: 4
Views: 2092

Coleochaete algae with zoospores

For some time there's been spots of algae colonising one side of my critter tank. I scraped a sample to try and ID it and noticed this strangeness. I think this is a colony of Botryococcus braunii (please correct if I'm mistaken), but what I don't understand is what is going on it the cell at the ce...
by Chris Dee
Fri Apr 03, 2020 1:13 pm
Forum: Specimens, samples and slides
Topic: Apple Twig Hand Section, Stain & Mount
Replies: 9
Views: 4391

Re: Apple Twig Hand Section, Stain & Mount

Thanks for explaining the process, much appreciated.
by Chris Dee
Wed Apr 01, 2020 9:15 pm
Forum: Pictures and Videos
Topic: Brachionus rotifer hatches from an egg
Replies: 6
Views: 2830

Re: Brachionus rotifer hatches from an egg

Well done, thanks for sharing.
by Chris Dee
Wed Apr 01, 2020 4:31 pm
Forum: Microscopy accessories
Topic: Pipettes adquisition
Replies: 1
Views: 1777

Re: Pipettes adquisition

The 50mm one is the largest baster I've seen. :shock: Very useful for taking deeper pond and rock pool samples.
by Chris Dee
Wed Apr 01, 2020 4:20 pm
Forum: Miscellaneous
Topic: juan antonio alcober bosch
Replies: 8
Views: 3363

Re: juan antonio alcober bosch

Not to mention the time spent in specimen preparation. If you could take it home at weekends though.. :D
by Chris Dee
Wed Apr 01, 2020 3:52 pm
Forum: Microscopes and optics
Topic: Vickers M17 refurb' & modification
Replies: 30
Views: 9621

Re: Vickers M17 refurb' & modification

Quick shots of the eyepieces. I did quickly try the both the binocular 10x eyepieces and the 10x graticuled adjustable-focus eyepiece (both comp) that came with the unit in the photo tube, however the crop factor was v-large and consequently low contrast with direct projection. Possibly something to...
by Chris Dee
Wed Apr 01, 2020 3:13 pm
Forum: Microscopes and optics
Topic: Vickers M17 refurb' & modification
Replies: 30
Views: 9621

Re: Vickers M17 refurb' & modification

Thank you apochronaut for the detailed explanation, much appreciated. The eyelens on these eyepieces is flat, the lower lens of the eyepiece is flush with the base and slightly concaved. Below is a quick video of the 16x Neofluar, and 25x Jena APO with an uncooperative subject. I tried to get footag...
by Chris Dee
Tue Mar 31, 2020 11:22 pm
Forum: Microscopes and optics
Topic: Vickers M17 refurb' & modification
Replies: 30
Views: 9621

Re: Vickers M17 refurb' & modification

Published in Apr 1965 if the number at the bottom is a date code. I also have this from the same source as well as other documents. Caused me some confusion over the NA discrepancies of my objectives until I realised it pre-dated the M17. Still a good document though, very informative.
by Chris Dee
Tue Mar 31, 2020 9:58 pm
Forum: Microscopes and optics
Topic: Vickers M17 refurb' & modification
Replies: 30
Views: 9621

Re: Vickers M17 refurb' & modification

The eyelens on my Vickers eyepieces are 15.7mm diameter. There is a thin pale yellow peripheral ring at the edge of the view coverage, is this the CA you were referring to? I'd assumed this was common to all compensating eyepieces.
by Chris Dee
Tue Mar 31, 2020 8:41 pm
Forum: Microscopes and optics
Topic: Vickers M17 refurb' & modification
Replies: 30
Views: 9621

Re: Vickers M17 refurb' & modification

Thanks for the info' on the 25x objective Bob, I had no clue about its heritage. Its my favourite of the objectives I own, not only for its clarity but 25x is such a useful magnification for many species of pond life observations. This possibly confirms my thoughts that the eyepieces in my china tri...
by Chris Dee
Tue Mar 31, 2020 8:23 pm
Forum: Identification help
Topic: Viridiraptor?
Replies: 6
Views: 3207

Re: Viridiraptor?

Cracking behavioural observation and video, thanks for sharing.
by Chris Dee
Tue Mar 31, 2020 8:20 pm
Forum: Pictures and Videos
Topic: Video Micrographs of Life in Salt Water
Replies: 5
Views: 2276

Re: Video Micrographs of Life in Salt Water

Your new tank will provide you with hours of fun observations, congratulations.
by Chris Dee
Tue Mar 31, 2020 8:14 pm
Forum: Pictures and Videos
Topic: Fossiliferous chalcedony
Replies: 7
Views: 3397

Re: Fossiliferous chalcedony

Impressive section. Nice work.
by Chris Dee
Tue Mar 31, 2020 7:46 pm
Forum: Microscopes and optics
Topic: Vickers M17 refurb' & modification
Replies: 30
Views: 9621

Re: Vickers M17 refurb' & modification

Corrected, thanks for pointing that out. Need to take a break from searching eBay for fluorite objectives, and lay off the wine when posting ;) ...Sadly I have today discovered PWM generated strobe lines in a video I was editing -snip- When the PWM frequency is too low, rapid (short-duration) exposu...
by Chris Dee
Tue Mar 31, 2020 7:29 pm
Forum: Microscopes and optics
Topic: Vickers M17 refurb' & modification
Replies: 30
Views: 9621

Re: Vickers M17 refurb' & modification

Chris ... I forgot to thank you for the ebay reference for that damping grease Recommendations like that are very helpful. MichaelG. . Incidentally, I have [thanks to Google] just translated the Chinese characters on the lid ... It does indeed say Damping Grease The wonders of modern technology tha...
by Chris Dee
Tue Mar 31, 2020 7:18 pm
Forum: Microscopes and optics
Topic: Vickers M17 refurb' & modification
Replies: 30
Views: 9621

Re: Vickers M17 refurb' & modification

Thanks everyone for the kind words and encouragement. Sadly I have today discovered PWM generated strobe lines in a video I was editing, they are fine but noticeable. My initial testing was obviously not thorough enough, my apologies. I have edited the post to reflect this, back to the bench power s...
by Chris Dee
Mon Mar 30, 2020 10:09 pm
Forum: Microscopes and optics
Topic: Vickers M17 refurb' & modification
Replies: 30
Views: 9621

Re: Vickers M17 refurb' & modification

Yes I read Alans page, likewise it seems there is no one definitive measurement when used in other photo tube systems other than Olympus's own.
by Chris Dee
Mon Mar 30, 2020 9:40 pm
Forum: Microscopes and optics
Topic: Vickers M17 refurb' & modification
Replies: 30
Views: 9621

Re: Vickers M17 refurb' & modification

I took a chance on the Vickers M17 pictured below […] On the subject of projection eyepieces and the flange step to sensor distance.. I've read various figures stated for Olympus NFK 125 LD eyepieces from 125mm to 150mm (the distance between the step on the eyepiece which rests against the photo tu...
by Chris Dee
Mon Mar 30, 2020 9:28 pm
Forum: Microscopes and optics
Topic: Vickers M17 refurb' & modification
Replies: 30
Views: 9621

Re: Vickers M17 refurb' & modification

Thanks Hobbyst. The simple reason for LED illumination over halogen is I prefer it. Not sure if it is my ageing eyes but I find it easier to see fine details under LED illumination (the replacement XHP35 is 6K btw, I forgot to mention it). The main eyepieces are Vickers 10x WF Comp (compensating) on...
by Chris Dee
Mon Mar 30, 2020 8:29 pm
Forum: Microscopes and optics
Topic: Vickers M17 refurb' & modification
Replies: 30
Views: 9621

Vickers M17 refurb' & modification

I took a chance on the Vickers M17 pictured below, it had obviously been well used and would likely need some effort to bring it back to working order. I won it for a reasonable £170. The Vickers M17 was made in England and produced between the mid 1970's and early 80's. The design was a modular one...
by Chris Dee
Sat Mar 28, 2020 11:30 am
Forum: Microscopy accessories
Topic: What is it? Marker?? Oiler??
Replies: 8
Views: 4750

Re: What is it? Marker?? Oiler??

Looks to me like it might be a sampler, swung round on the turret when a sample is needed from a specific area of an uncovered culture dish. Turning the knurled section would dip the hollow tip into and out of the sample medium, later retrieving the contents for further analysis.
by Chris Dee
Thu Feb 27, 2020 12:37 am
Forum: Home-made microscope adaptations
Topic: Rotating stage
Replies: 2
Views: 4773

Re: Rotating stage

I've been experimenting with some polarizing films also. Further details of your results would be appreciated.