Search found 168 matches

by photomicro
Wed Jul 08, 2020 1:03 pm
Forum: Microscopes and optics
Topic: Euromex or Motic?
Replies: 54
Views: 421

Re: Euromex or Motic?

Have sent PM, but not sure if you have been a member long enough.
by photomicro
Thu Jul 02, 2020 8:10 am
Forum: Microscopes and optics
Topic: Dovetail on the bottom of a BH2 1.25 condenser. 
Replies: 2
Views: 251

Re: Dovetail on the bottom of a BH2 1.25 condenser. 

It might be worth mentioning that the Nikon and Olympus dovetails are very similar, with the Nikon being slightly smaller. Hence, a Nikon condenser will fit an Olympus stand, but not vice-versa. There are a *lot* of similarities between say the BH2 and Optiphot (and others) stands of these two maker...
by photomicro
Mon Jun 22, 2020 8:45 am
Forum: Camera systems and imaging
Topic: Microstar IV Camera Setup
Replies: 15
Views: 487

Re: Microstar IV Camera Setup

I can't find any reference to *what* eyepiece is being used in the afocal method...
by photomicro
Fri Jun 19, 2020 1:45 pm
Forum: Specimens, samples and slides
Topic: Diatom Mounting Medium Hunt
Replies: 15
Views: 685

Re: Diatom Mounting Medium Hunt

I can provide small quantities of the following for interested amateurs;

Pleurax (in alcohol)

Naphrax (in toluene)

Filtered Storax (in chloroform)


You need to PM me to enquire. Sending from the UK.
by photomicro
Thu Jun 04, 2020 6:40 pm
Forum: Introduce yourself
Topic: Hello from Sunny Wiltshire
Replies: 7
Views: 330

Re: Hello from Sunny Wiltshire

Excuse the ignorance Hobbyst46, but what did you mean by "field aperture"? Thank you for the information on the book by Hall and Linssen. I love old books on anything to do with practical Science. There's so much in them that has been lost even if some of the chemicals used wouldn't be allowed in m...
by photomicro
Thu Jun 04, 2020 3:52 pm
Forum: Introduce yourself
Topic: Hello from Sunny Wiltshire
Replies: 7
Views: 330

Re: Hello from Sunny Wiltshire

I have a brochure for this microscope, and the May 1967 price list, when prices were quoted in pounds, shillings and pence. As I recall it was billed as a laboratory microscope with research capabilities. Yours is shown with the mains voltage illuminator, yet has the rheostat control which normally ...
by photomicro
Wed May 27, 2020 10:50 am
Forum: Articles and images to be published
Topic: Making Permanent Microscope Slides of Insects
Replies: 3
Views: 589

Re: Making Permanent Microscope Slides of Insects

There was quite a bit on this subject within the booklets published by NBS (Northern Biological Supplies) in the UK in the 1970s. These were done by Eric Marson, and can often be picked up as separate booklets on each topic, or as a bound volume of all 17 booklets. Eric taught a great deal, and tuto...
by photomicro
Fri May 15, 2020 8:38 am
Forum: Specimens, samples and slides
Topic: My Arachnoidiscus
Replies: 9
Views: 1032

Re: My Arachnoidiscus

Nicely imaged grouping photomicro, what objective did you use? Perhaps it is because I don't have DIC at present, though I used to ... What is the story there? Upgrading to an infinity system? Used a x20 objective. This is VAC, or variable amplitude contrast, which is easily made for any stand. In ...
by photomicro
Thu May 14, 2020 6:48 pm
Forum: Specimens, samples and slides
Topic: My Arachnoidiscus
Replies: 9
Views: 1032

Re: My Arachnoidiscus

Lovely oblique/brightfield images. I know DIC is often the desired method for these subjects, but I still much prefer this type of shot. Thanks for sharing. I agree, I like this kind of method too. Perhaps it is because I don't have DIC at present, though I used to, but it does seem to work nicely ...
by photomicro
Wed May 13, 2020 10:43 am
Forum: Microscopes and optics
Topic: Optiphot nose piece question
Replies: 13
Views: 1804

Re: Optiphot nose piece question

As requested/promised, photos of my nosepieces and the optiphot limb/head detail mentioned in earlier reply. DSC05571.jpg DSC05570.jpg DSC05568.jpg DSC05565.jpg HOW DO YOU REMOVE COMPLETELY THE NOSEPIECE AS ILLUSTRATED ON THE FIRST PICTURE!? I’m on a cleaning spree of my Labophot & I’ve never been ...
by photomicro
Sun May 03, 2020 9:58 am
Forum: Illumination Techniques
Topic: Leica Integrated Modulation Contrast (Variant of Hoffman)
Replies: 7
Views: 1079

Re: Leica Integrated Modulation Contrast (Variant of Hoffman)

Whoops, I had it wrong about the small ND filter part of the smaller slider; it is actually a glass disk that covers the entire hole. On it are plated the areas of 15% and 1%, the rest left clear. I can't say about your microscope. What make and model is it? What is the triangular filter for? edit:...
by photomicro
Wed Apr 29, 2020 10:29 am
Forum: For forum members who want to buy and sell equipment
Topic: Wanted: Stereo scope - perhaps Nikon SMZ10?
Replies: 5
Views: 916

Re: Wanted: Stereo scope - perhaps Nikon SMZ10?

PM sent, though as a new user, you may not be able to receive.
by photomicro
Fri Apr 24, 2020 7:55 am
Forum: Off Topic
Topic: Please opine source, time term 'coined'...diatom twitching?
Replies: 4
Views: 1076

Re: Please opine source, time term 'coined'...diatom twitching?

Non-UK based folk may especially be both informed and amused by this, which happened to be on Radio 3 last night !

(always assuming they can link to it)


https://www.bbc.co.uk/programmes/b0b1q2f5
by photomicro
Thu Apr 23, 2020 8:08 am
Forum: Beginner's corner
Topic: Can i use lomo KF- 4 phase condenser with leitz phase objectives?
Replies: 2
Views: 381

Re: Can i use lomo KF- 4 phase condenser with leitz phase objectives?

The bottom line is that if it physically fits your microscope, then it will work, but whether any of the phase annuli will match in size with the phase rings in the Leitz objectives is another thing. As it is, I am rather surprised the Leitz objectives work on this stand. The stand was designed for ...
by photomicro
Wed Apr 22, 2020 11:22 am
Forum: Microscopes and optics
Topic: Olympus BH-2 question
Replies: 8
Views: 675

Re: Olympus BH-2 question

I *think* they made a 'plug-in' filter, like the one shown in the pictures. I have no idea what make this is. This is a blue filter, but can support other discs such as stops. Of course whether this is the ideal place for such a stop depends on the design of the condenser. Another forum member also ...
by photomicro
Mon Apr 20, 2020 4:29 pm
Forum: Illumination Techniques
Topic: PDFs of the VAC articles/papers?
Replies: 2
Views: 447

Re: PDFs of the VAC articles/papers?

PM me.

Mike
by photomicro
Mon Apr 06, 2020 5:43 pm
Forum: Beginner's corner
Topic: Kohler Trouble
Replies: 40
Views: 1747

Re: Kohler Trouble

It does, it's held in by one screw. https://i.imgur.com/sb4jELp.jpg I am not yet sure what exactly is causing the unlevel stage because I don't have another BH-2 to see how it "should" fit. I suspect the screw *should* fit lower into the dovetail, not on the top like it is. The screw also does not ...
by photomicro
Mon Apr 06, 2020 2:18 pm
Forum: Beginner's corner
Topic: Kohler Trouble
Replies: 40
Views: 1747

Re: Kohler Trouble

Don't own an Olympus BH2, but as a 12v 100 watt Halogen puts out a lot of light (particularly as in order to maintain/extend bulb life it should be kept within a 9-11 volt range), it would make sense that it should have an ND filter for most observations and that it be removed for say high magnific...
by photomicro
Mon Apr 06, 2020 11:43 am
Forum: Microscopes and optics
Topic: Intriguing objective
Replies: 10
Views: 590

Re: Intriguing objective

Can’t remember where I saw it but recently saw a photo of a Zeiss objective-probably from neofluar era by the look of it but was changeable from 1.6x to 5x via collar-has anyone used this particular objective?-maybe there’s a downside to it but an appealing idea-to have all your lower mags provided...
by photomicro
Fri Apr 03, 2020 10:04 am
Forum: Introduce yourself
Topic: diatoms
Replies: 11
Views: 835

Re: diatoms

Hi Mike, thank you for the link! This booklet also contains the description of the little field microscope that would be useful for diatom collecting. Here is a link to a detailed research on diatom refractive indices: http://www.mikroskopie-ph.de/Mikrokosmos,%20Band%2098%282%29,%20S.%2098%20%28200...
by photomicro
Thu Apr 02, 2020 7:13 pm
Forum: Introduce yourself
Topic: diatoms
Replies: 11
Views: 835

Re: diatoms

Hi Frank, diatoms are basically transparent and have a refractive index around 1,45. To get a contrasty image a difference of the refractive index of the mountant of 0,1 is recommended. This doesn't necessarily mean that it has to be higher though. Diatoms in air give lots of contrast but you can't...
by photomicro
Thu Apr 02, 2020 9:09 am
Forum: For forum members who want to buy and sell equipment
Topic: Stereomicroscope Help
Replies: 10
Views: 742

Re: Stereomicroscope Help

Quoting your budget in pounds, and looking at Brunel, implies that you are UK based.

If you want to PM me, I can probably help out, having had a couple of dozen such stands through my hands in the last few years (occupational hazard) and am also UK based.

Mike
by photomicro
Sun Mar 29, 2020 4:21 pm
Forum: Specimens, samples and slides
Topic: Whole Mount Insect Slide Preparation Part 2
Replies: 7
Views: 1115

Re: Whole Mount Insect Slide Preparation Part 2

I think that some prefer Euparal because it has a clearing effect, but also because it tends to be more tolerant of water, hence if the dehydration is incomplete, this is less of an issue. I think IPA is an acronym often used for iso-propyl alcohol. Eric Marson, founder of Northern Biological Suppli...
by photomicro
Fri Mar 20, 2020 8:00 pm
Forum: Miscellaneous
Topic: "Fibres" common topic? Did you make interesting observations or photos?
Replies: 17
Views: 2460

Re: "Fibres" common topic? Did you make interesting observations or photos?

Now and then, I have come across microscope slides where a short section of silk has been enclosed in a cell, to make a permanent slide. Spider silk is said to be the inspiration for some technology applications in modern times, but the excerpt below shows another side; spider web.jpg Many modern fa...
by photomicro
Tue Mar 17, 2020 7:43 pm
Forum: Microscopes and optics
Topic: Inverted Stereomicroscope
Replies: 11
Views: 2185

Re: Inverted Stereomicroscope

What would be the specific advantages of an inverted stereo?
by photomicro
Fri Feb 21, 2020 11:32 am
Forum: Pictures and Videos
Topic: Tardigrade egg?
Replies: 2
Views: 762

Re: Tardigrade egg?

It is a diatom !

Most likely Coscinodiscus.
by photomicro
Thu Feb 20, 2020 11:57 am
Forum: Illumination Techniques
Topic: Interesting DIY phase contrast
Replies: 4
Views: 1498

Re: Interesting DIY phase contrast

Yes, Graham is very good at making things for his microscopes. In the early days of Phase, when manufactured systems were difficult to obtain in the UK, and expensive too, a number of folk experimented. A quite comprehensive article of over 10 pages was published in 'The Microscope' in 1947 by Micha...
by photomicro
Fri Feb 07, 2020 10:12 am
Forum: Home-made microscope adaptations
Topic: LABOPHOT 2 EXTERNAL ILLUMINATOR
Replies: 12
Views: 3142

Re: LABOPHOT 2 EXTERNAL ILLUMINATOR

Because the metal plate that houses the collector lens (shown in Steve's picture) is magnetic, you can use this fact to hold whatever is housing your LED. Shown below is just a repurposed lamp tube (from an old Olympus I think) with a Cree LED inside. There is a small neodymium magnet glued to the f...
by photomicro
Thu Feb 06, 2020 7:23 pm
Forum: Beginner's corner
Topic: First microscope for the-odin
Replies: 12
Views: 3949

Re: First microscope for the-odin

NOTE: The way we can offer this kit at such a low price is by finding the best deals with our partners and manufacturers. That means that this kit takes 1-2 months to ship. Please be patient and understand we are doing our best to get it to you. Honestly that explanation doesn't sound very convinci...
by photomicro
Thu Feb 06, 2020 3:20 pm
Forum: Beginner's corner
Topic: First microscope for the-odin
Replies: 12
Views: 3949

Re: First microscope for the-odin

Perhaps you could outline how you would use a microscope in these studies.

In teaching students some of these techniques; gel electrophoresis, PCR, etc. we never used a microscope, and I am struggling to see how a compound microscope in particular would help.