Search found 149 matches

by photomicro
Fri Apr 03, 2020 10:04 am
Forum: Introduce yourself
Topic: diatoms
Replies: 10
Views: 153

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: 10
Views: 153

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: 203

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: 155

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: 520

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: 9
Views: 739

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: 581

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: 919

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: 2258

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: 2880

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: 2880

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.
by photomicro
Wed Feb 05, 2020 9:29 am
Forum: Collecting microscopes and slides
Topic: Help me identify this vintage Nikon?
Replies: 1
Views: 1316

Re: Help me identify this vintage Nikon?

Looks like the CL model. I think this sold in the early 1970s, and was a basic student model.
by photomicro
Sun Jan 26, 2020 5:01 pm
Forum: Camera systems and imaging
Topic: How to attach camera to Olympus BH2?
Replies: 23
Views: 6259

Re: How to attach camera to Olympus BH2?

The Olympus "Photomicro Adapter L" has a fixed aperture at the bottom. Please, can anyone tell me or measure me the diameter of the aperture and the distance from the base of the adapter to the aperture? I am in the process of building a phototube for my BH2 microscope and I have a lathe for this p...
by photomicro
Mon Jan 13, 2020 10:51 am
Forum: Microscopes and optics
Topic: Nikon Microphot-FXL
Replies: 7
Views: 556

Re: Nikon Microphot-FXL

I assume you have seen this on the same MicroscopyU website;

https://www.microscopyu.com/museum/micr ... microscope

I have a PDF of Instructions for the FXA if it is any use, dated 1986.

Literature I have includes the Microphone FX, S , FXA and SA but not the FXL.

Mike
by photomicro
Fri Jan 10, 2020 9:57 pm
Forum: Introduce yourself
Topic: Hi from UK - beer bugs hunter here
Replies: 4
Views: 1342

Re: Hi from UK - beer bugs hunter here

Welcome indeed.

Having helped out some local commercial breweries in recent years, I am intrigued as to how this will turn out. Will you be wanting to do counts?
by photomicro
Fri Dec 20, 2019 11:15 am
Forum: Home-made microscope adaptations
Topic: LABOPHOT 2 EXTERNAL ILLUMINATOR
Replies: 12
Views: 2258

Re: LABOPHOT 2 EXTERNAL ILLUMINATOR

Photomicro, no special reason I would like to learn about different sources of light for the DF, PH etc.... Hi Steve On this model, the existing filament is fairly close to a disc of glass in front of the collector lens. I presume you have found the insert that can hold two filters underneath, furt...
by photomicro
Thu Dec 19, 2019 4:09 pm
Forum: Home-made microscope adaptations
Topic: LABOPHOT 2 EXTERNAL ILLUMINATOR
Replies: 12
Views: 2258

Re: LABOPHOT 2 EXTERNAL ILLUMINATOR

Why do you need to replace the original?
by photomicro
Sun Dec 15, 2019 2:43 pm
Forum: Beginner's corner
Topic: Microscope -Avian Disease's
Replies: 9
Views: 955

Re: Microscope -Avian Disease's

I have sent you a PM Andrew, so check your inbox.
by photomicro
Sun Dec 01, 2019 11:10 am
Forum: Miscellaneous
Topic: Microlife Services (Klaus Kemp)
Replies: 4
Views: 1294

Re: Microlife Services (Klaus Kemp)

A friend of mine was in contact with him only this week, so he is still active. Some family commitments have been taking up some time, so do bear with him.
by photomicro
Sun Nov 24, 2019 10:28 pm
Forum: Beginner's corner
Topic: Nikon Optiphot replacement bulb
Replies: 9
Views: 1135

Re: Nikon Optiphot replacement bulb

You’ll need a vertical facing filament to fill the aperture at high numerical apertures. That's good to know. Thank you. My current Optiphot has a horizontal filament so it will be interesting to compare the two bulb varieties under various conditions. The bulb stated in the Optiphot manual is a Ph...
by photomicro
Wed Nov 20, 2019 4:23 pm
Forum: Introduce yourself
Topic: Hello all...retired and looking for a starter microscope
Replies: 7
Views: 926

Re: Hello all...retired and looking for a starter microscope

Hi Dave welcome (back) to the wonderful world of the hidden. I guess many folk on here would recommend getting more for your money by buying second-hand. There are numerous meetings in the UK each year where you can get such an instrument, and be helped by knowledgeable folk in your quest. Contact ...
by photomicro
Wed Nov 20, 2019 1:45 pm
Forum: Introduce yourself
Topic: Hello all...retired and looking for a starter microscope
Replies: 7
Views: 926

Re: Hello all...retired and looking for a starter microscope

Hi Dave welcome (back) to the wonderful world of the hidden. I guess many folk on here would recommend getting more for your money by buying second-hand. There are numerous meetings in the UK each year where you can get such an instrument, and be helped by knowledgeable folk in your quest. Contact e...
by photomicro
Sun Nov 03, 2019 9:23 pm
Forum: Specimens, samples and slides
Topic: DufayColor, réseau layer
Replies: 8
Views: 2197

Re: DufayColor, réseau layer

Just found some photos I took of various variants of this technology. I had totally forgotten about the Paget system.

Here it is.



IMG_6768.jpg
IMG_6768.jpg (386.93 KiB) Viewed 2114 times
by photomicro
Sun Nov 03, 2019 9:14 pm
Forum: Specimens, samples and slides
Topic: DufayColor, réseau layer
Replies: 8
Views: 2197

Re: DufayColor, réseau layer

A nice talking point Michael. I am intrigued now to know when this box was put out on circuit, principally because in early 1993 I put a box out onto circuit that included a slide I had made of a small piece of Polarchrome film. As has been mentioned above, the great advantage of this technology is ...
by photomicro
Mon Oct 28, 2019 7:43 pm
Forum: Introduce yourself
Topic: Hi
Replies: 13
Views: 3642

Re: Hi

Have a look at 'M82' in the list that appears when you load;

http://www.microscopy-uk.org.uk/Little-Imp/index.html

The information on the different illumination systems particularly are useful.

Mike
by photomicro
Mon Oct 28, 2019 8:13 am
Forum: Introduce yourself
Topic: Hi
Replies: 13
Views: 3642

Re: Hi

Is that a Watson Microsystem 70 I see...

Do you have the manual?

Mike
by photomicro
Sun Oct 27, 2019 3:51 pm
Forum: Introduce yourself
Topic: Hi
Replies: 13
Views: 3642

Re: Hi

Hi Rob there is quite a good community of amateur microscopists here in the UK. There are a few Societies, and several meetings throughout the year where you can see the work of others, hear talks, swap ideas, learn from experienced and enthusiastic amateurs, and get gear and useful consumables like...
by photomicro
Fri Oct 25, 2019 1:23 pm
Forum: Microscopes and optics
Topic: Olympus Objectives That Need NFK Relay Lens Correction
Replies: 4
Views: 1306

Re: Olympus Objectives That Need NFK Relay Lens Correction

A good explanation from Pete regarding corrections. However, I cannot help but be slightly amused by the change made by Olympus, bearing in mind this, from a booklet they published in 1985 I think. It is a 40 page offering entitled 'Basics of the optical Microscope'. A.jpg Perhaps they no longer con...
by photomicro
Mon Oct 07, 2019 9:19 am
Forum: For forum members who want to buy and sell equipment
Topic: Nikon E400 for sale
Replies: 4
Views: 1742

Re: Nikon E400 for sale

Just sent you a PM...but you may not be able to get this if you are new on the forum.

Let me know, Mike.
by photomicro
Wed Oct 02, 2019 9:53 am
Forum: Microscopy accessories
Topic: Eyepiece micrometer diameter?
Replies: 4
Views: 2226

Re: Eyepiece micrometer diameter?

They certainly made them in this size (21mm), I find in my box of micrometers that I have three of this size;

One a grid (10 x 10, labelled 1-10 down one side, A-J down the other)

One with 0-100 divisions

One with two such lines at right-angles, ie. a cross.

Mike