Search found 7753 matches

by 75RR
Sun May 09, 2021 7:16 am
Forum: Pictures and Videos
Topic: melosira + pleurosigma
Replies: 11
Views: 270

Re: melosira + pleurosigma

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Many thanks everyone - most kind!
by 75RR
Sat May 08, 2021 6:50 pm
Forum: Microscopes and optics
Topic: Spring loaded objective
Replies: 20
Views: 323

Re: Spring loaded objective

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Did not realize this would entail breaking the oil seal.

If I had, I would have left it as is.
by 75RR
Sat May 08, 2021 6:37 pm
Forum: Microscopes and optics
Topic: Spring loaded objective
Replies: 20
Views: 323

Re: Spring loaded objective

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Do you know how would one reseal it afterwards?
by 75RR
Sat May 08, 2021 6:09 pm
Forum: Microscopes and optics
Topic: Spring loaded objective
Replies: 20
Views: 323

Re: Spring loaded objective

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Yes, can't unscrew the outer sleeve with the writing and the logo on it. It won't move.

Am turning it anticlockwise viewed from on top.

Does taking it off break the oil seal?
by 75RR
Sat May 08, 2021 4:45 pm
Forum: Microscopes and optics
Topic: Spring loaded objective
Replies: 20
Views: 323

Re: Spring loaded objective

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UPDATE:

Unable to remove the outer sleeve. Is there a trick to removing it?

Placed rubber bands on both parts and tried to turn by hand. No luck. Now the movement is stiffer than it was!
by 75RR
Sat May 08, 2021 3:38 pm
Forum: Microscopes and optics
Topic: Spring loaded objective
Replies: 20
Views: 323

Re: Spring loaded objective

Up to this dismantling stage, the optics as such remain untouched, nothing is misaligned. After cleaning the guide surfaces and reapplying a suitable lubricant, the steps shown can be carried out backwards. The spring force should now be sufficient to let the lens cup rebound as far as it will go. ...
by 75RR
Sat May 08, 2021 2:49 pm
Forum: Microscopes and optics
Topic: Spring loaded objective
Replies: 20
Views: 323

Re: Spring loaded objective

Hi 75RR, photos for dismantling the Planapo 63/1,40: https://www.mikroskopie-forum.de/index.php?topic=32250.0 Reference to Planapo 40/0,95 korr - maybe some coincidence? https://mikroskopie-forum.at/lexicon/index.php?entry/126-planapo-40-0-95-von-zeiss-west/ Hope it helps a bit. Many thanks Imperat...
by 75RR
Sat May 08, 2021 2:33 pm
Forum: Microscopes and optics
Topic: Spring loaded objective
Replies: 20
Views: 323

Re: Spring loaded objective

Hi, does the spring simply drop-out as my Oly's do? If so a simple solution, assuming that the lens-pack is sliding up and down freely, may be to pull the spring apart by perhaps 50-100% to give it a little more 'push'.... That might work I suppose, assuming that is how springs work. I have a 100x ...
by 75RR
Sat May 08, 2021 10:45 am
Forum: Pictures and Videos
Topic: melosira + pleurosigma
Replies: 11
Views: 270

Re: melosira + pleurosigma

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Thanks Luis Carlos, most kind!
by 75RR
Sat May 08, 2021 10:44 am
Forum: Microscopes and optics
Topic: Spring loaded objective
Replies: 20
Views: 323

Re: Spring loaded objective

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Thanks MichaelG., not scrap yet though I suspect if I start tinkering it soon might be ;)

Thanks Hobbyst46 , I have opened a dry Plan 40x. They seem quite different to the Oel Planapos.

Thanks mrsonchus, I can get at the spring from the back, just don't know what to do from there.
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by 75RR
Sat May 08, 2021 7:35 am
Forum: Microscopes and optics
Topic: Spring loaded objective
Replies: 20
Views: 323

Spring loaded objective

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Anyone ever open up a Zeiss 63x/1.4 Planapo?

It does not spring back as quickly as it should - would like to remedy that.
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by 75RR
Sat May 08, 2021 5:30 am
Forum: Pictures and Videos
Topic: melosira + pleurosigma
Replies: 11
Views: 270

Re: melosira + pleurosigma

. Thanks LouiseScot I pin them with the cover slip. To do this i wick the water from under the cover slip using absorbent material - usually tissue paper. This has two functions, it holds the subject down and places it in the 'sweet spot' re imaging.* This does not always work of course, even the sm...
by 75RR
Fri May 07, 2021 9:56 pm
Forum: Pictures and Videos
Topic: melosira + pleurosigma
Replies: 11
Views: 270

melosira + pleurosigma

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Zeiss Planapo 63x/1.4, DIC, 20µm width (melosira), stacked in Photoshop, Marine sample, Alboran Sea.

I prefer it when they are on their own, this is messy, still, thought it worth a stack. In this case 54 images.
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by 75RR
Thu May 06, 2021 9:24 pm
Forum: Introduce yourself
Topic: Newbie interested in mycology
Replies: 5
Views: 235

Re: Newbie interested in mycology

Is anyone familiar with this shop? Is this a reasonable price for used compound scopes? You did well to ask. None of them are reasonably priced! Nothing wrong with a brand name, they are well regarded for a reason. You do however have to get to know which models are which, as not all are created eq...
by 75RR
Thu May 06, 2021 8:41 pm
Forum: Microscopes and optics
Topic: Olympus SP x100 oil behaves strangely!! am I crazy ?
Replies: 9
Views: 304

Re: Olympus SP x100 oil behaves strangely!! am I crazy ?

ALso i noticed this little hole on the lens :
There does seem to be something there. We need a better (close up) photograph - do you have a macro lens?
by 75RR
Thu May 06, 2021 8:31 pm
Forum: Microscopy accessories
Topic: Buying expired slides - hit or miss
Replies: 17
Views: 351

Re: Buying expired slides - hit or miss

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Had not come across an expiration date on slides or cover slips - so news to me. Thanks for the tip.
by 75RR
Wed May 05, 2021 10:17 am
Forum: Illumination Techniques
Topic: Need Value for NA Formula
Replies: 7
Views: 356

Re: Need Value for NA Formula

Now that I understand the practical reason for the N.A. being imprinted on the objectives, i.e. evaluating if magnification is useful dependent on the eyepiece magnification--NA(1000) = useful magnification. Calculating useful magnification is certainly something that should be done when putting to...
by 75RR
Tue May 04, 2021 8:29 pm
Forum: Illumination Techniques
Topic: Difference of using Planapo 63x /1.40 Oil dic slider and Plan newfluar 100x /1.30 Oil dic slider?
Replies: 3
Views: 176

Re: Difference of using Planapo 63x /1.40 Oil dic slider and Plan newfluar 100x /1.30 Oil dic slider?

. I think that a repeatable stationary subject like a Diatom test slide might make for a more useful comparison. In any case, even though Zeiss did make dedicated DIC sliders for particular objectives, a little experimentation has shown that a surprising number of objectives and sliders in various c...
by 75RR
Tue May 04, 2021 7:43 pm
Forum: Microscopes and optics
Topic: Eyepiece diameter
Replies: 10
Views: 236

Re: Eyepiece diameter

. Thanks ImperatorRex, just what I needed! + photo as well, so no ambiguity :) Thanks for confirming Timor The eyepiece shown by ImperatorRex above is 10x/20 eyepiece, which was apparently more modern than those 10x/18 (or 12.5x/18) shown in the catalogue. Good point! Catalogue only goes up to 46 40...
by 75RR
Tue May 04, 2021 1:01 pm
Forum: For forum members who want to buy and sell equipment
Topic: Cargille type B immersion oil
Replies: 4
Views: 224

Re: Cargille type B immersion oil

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Thanks Charles - do appreciate that!

Update: 1 Oz Type B on its way ETA 11th May :)
by 75RR
Tue May 04, 2021 10:47 am
Forum: Microscopes and optics
Topic: Eyepiece diameter
Replies: 10
Views: 236

Re: Eyepiece diameter

. Thanks Hobbyst46, that is a useful selection of eyepiece measurements. (Found your 46 41 42 on table 28) Given your max measurment of 29mm it would seem that we are looking at 32mm, allowing for some wiggle room. Wonder if Timor's 34.5mm is due to having the wider counterpart of mine and or the 10...
by 75RR
Tue May 04, 2021 9:42 am
Forum: Microscopes and optics
Topic: Eyepiece diameter
Replies: 10
Views: 236

Re: Eyepiece diameter

. Thanks Hobbyst46 and Timor It does seem that the eyepieces from Table 29 are the widest. I have just one, the 12.5x Br Kpl, though I think mine is the smaller companion as it does not have the description on the side, just on top. Max diameter measures 28mm The 12.5W eyepiece "12.5x Br Kpl wide-an...
by 75RR
Tue May 04, 2021 7:22 am
Forum: Microscopes and optics
Topic: Eyepiece diameter
Replies: 10
Views: 236

Eyepiece diameter

. Working on a camera attachment for a phototube. Wanted to make sure that I allowed sufficient room for the widest eyepiece to fit to give it more flexibility. Think that might be the Zeiss 160 eyepieces designed for micrometer discs. See Photo: If anyone who has some can provide top diameter... Th...
by 75RR
Mon May 03, 2021 10:35 pm
Forum: Identification help
Topic: Larvae
Replies: 2
Views: 121

Re: Larvae

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Water Boatman?
by 75RR
Mon May 03, 2021 10:18 pm
Forum: Identification help
Topic: Flatworm
Replies: 2
Views: 85

Re: Flatworm

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Perhaps a Stenostomum sp.
by 75RR
Mon May 03, 2021 5:54 pm
Forum: Pictures and Videos
Topic: Another Suctoria
Replies: 7
Views: 234

Re: Another Suctoria

Thanks for posting, fascinating creature!
by 75RR
Mon May 03, 2021 5:52 pm
Forum: For forum members who want to buy and sell equipment
Topic: Cargille type B immersion oil
Replies: 4
Views: 224

Re: Cargille type B immersion oil

Have you tried Cosmos Biomedical in England? They have their own product and it might be lass expensive than a known brand. Seems like a good product. Thanks for the Cosmos Biomedical tip, but shopping in England (now that is no longer part of the EU) has got more complicated. I am assuming there i...
by 75RR
Sun May 02, 2021 7:46 pm
Forum: Pictures and Videos
Topic: Paramecium Bursaria
Replies: 8
Views: 399

Re: Paramecium Bursaria

Agree! Very nice!
by 75RR
Sun May 02, 2021 5:16 am
Forum: My microscope
Topic: Feeling a bit lost (buying advice / Belgium)
Replies: 25
Views: 883

Re: Feeling a bit lost (buying advice / Belgium)

I went to pick up the advertised microscope (Motic B1 series) this afternoon. The 4x and 10x objective appear fine but the 40x objective seems to be dirty. Some supplies will arrive on Monday, including lens cleaner cloth, with which I hope to resolve that issue. Superficially, everything else appe...