Search found 214 matches

by RudiV
Sat Apr 29, 2017 11:14 am
Forum: Pictures and Videos
Topic: Snail in fluorescence - Revisited
Replies: 16
Views: 2161

Re: Snail in fluorescence - Revisited

hkv wrote:Yes, the red and the orange bits are algae/diatoms with chlorophyll. Chlorophyll fluoresce in red when excited with light of a wavelength around 400-440 nm.
Thanks for the information. I am hoping my fluorescence setup will be here soon, it is in customs at the moment.

Rudi
by RudiV
Sat Apr 29, 2017 10:17 am
Forum: Specimens, samples and slides
Topic: Dandelion slide making adventure - the beginning!
Replies: 19
Views: 3933

Re: Dandelion slide making adventure - the beginning!

A really interesting post with lots to learn!

Looking forward to the next update, thanks for sharing,
Rudi
by RudiV
Sat Apr 29, 2017 10:05 am
Forum: Pictures and Videos
Topic: Snail in fluorescence - Revisited
Replies: 16
Views: 2161

Re: Snail in fluorescence - Revisited

Another stunning and interesting image hkv!

Would the red bits be algae or other plant material? Fluorescence can really produce some interesting and unexpected results!

Thanks for sharing,
Rudi
by RudiV
Fri Apr 28, 2017 4:45 am
Forum: Pictures and Videos
Topic: Stamen - Thunbergia alata
Replies: 5
Views: 779

Re: Stamen - Thunbergia alata

Johann wrote:The lighting is excellent, gives great depth to the image.
SPAR globe + operator = awesome job ;)
Thanks Johann,

Yes, SPAR it is :D

Rudi
by RudiV
Thu Apr 27, 2017 6:21 pm
Forum: Pictures and Videos
Topic: Jumping spider
Replies: 10
Views: 1399

Re: Jumping spider

Wow, stunning images Johann! Yes, you made good use of the "free" day!

Thanks for sharing,
Rudi
by RudiV
Thu Apr 27, 2017 6:17 pm
Forum: Pictures and Videos
Topic: Euglenid and Vorticella
Replies: 8
Views: 1017

Re: Euglenid and Vorticella

Great images as always Johann!

Thanks for sharing,
Rudi
by RudiV
Thu Apr 27, 2017 6:16 pm
Forum: Pictures and Videos
Topic: Stamen - Thunbergia alata
Replies: 5
Views: 779

Stamen - Thunbergia alata

I have been playing around with epi-illumination on some of my favorite plant subjects. Initially I found it quite difficult as my scope arrived with a broken lamp and the closest substitute I had was only 15W and not the original 50W, I ordered lamps but shipping is slow to this part of the world. ...
by RudiV
Thu Apr 27, 2017 8:59 am
Forum: Microscopes and optics
Topic: Amscope dovtaile references !
Replies: 2
Views: 861

Re: Amscope dovtaile references !

Dear All, I am going to buy an Amscope (T670Q-PL) I want to modify it and a DIY fluorescente cube. But i desperatly need to know what kind of dovetail it has, to know if can inserte the one i am building. I contacted the info@amscope.com but they have no information at all to give me. Please, is th...
by RudiV
Thu Apr 27, 2017 4:59 am
Forum: Pictures and Videos
Topic: Silicoflagellates (Dictyochales)
Replies: 9
Views: 922

Re: Silicoflagellates (Dictyochales)

Fantastic detail hkv!

Interesting comparisons, thanks for sharing.
Rudi
by RudiV
Tue Apr 25, 2017 5:48 pm
Forum: Pictures and Videos
Topic: Stigma - Kalanchoe sexangularis
Replies: 3
Views: 523

Stigma - Kalanchoe sexangularis

The sticky coating on the stigma and style of the tiny Kalanchoe sexangularis flower can be seen in this image.

20x objective, 53 image stack, DF epi-illumination.

Image

Thanks for looking!
Rudi
by RudiV
Sat Apr 22, 2017 4:08 pm
Forum: Pictures and Videos
Topic: Diatom - Arachnoidiscus sp.
Replies: 19
Views: 1701

Re: Diatom - Arachnoidiscus sp.

This is a really beautiful set of images hkv! I think I need a water immersion lens!

Thanks for sharing,
Rudi
by RudiV
Sat Apr 22, 2017 3:59 pm
Forum: My microscope
Topic: My first Microscopes
Replies: 26
Views: 6049

Re: My first Microscopes

After being out of town for a few days I got home yesterday to a nice surprise. The spares for the focus mechanism of the CH2 sent to me by the seller arrived so I can now sort out that scope. More importantly 2 new (to me) metallurgical scopes also arrived, a BH2 BHM from the USA and a BH BHM from ...
by RudiV
Sat Apr 22, 2017 3:39 pm
Forum: Pictures and Videos
Topic: Pollen - Phacelia tanacetifolia
Replies: 4
Views: 558

Re: Pollen - Phacelia tanacetifolia

Nice, Rudi. Did you apply polarizer over your epi darkfield light? For 10x shot, you may try high angle incident (regular overhead) light. Many times incident light gives better images, when working distance is long enough. Thanks! No, I did not a polarizer but I do have the option on the scope so ...
by RudiV
Sat Apr 22, 2017 3:32 pm
Forum: Pictures and Videos
Topic: Pollen - Phacelia tanacetifolia
Replies: 4
Views: 558

Re: Pollen - Phacelia tanacetifolia

billbillt wrote:Hi Rudi,

That is a very beautiful set of photos!... Great work!...

BillT
Hi BillT.

Thanks!

Rudi
by RudiV
Sat Apr 22, 2017 2:05 pm
Forum: Pictures and Videos
Topic: Pollen - Phacelia tanacetifolia
Replies: 4
Views: 558

Pollen - Phacelia tanacetifolia

I found a lonely Purple Tansy - Phacelia tanacetifolia blooming in a corner of my garden. The pollen is quite large and blue/purple in color. The images were taken of the pollen still on the stamen using an Olympus BH-2 BHM metallurgical microscope. The illumination is EPI dark field. 10x objective,...
by RudiV
Tue Apr 18, 2017 12:49 pm
Forum: Miscellaneous
Topic: using 110 power supply in Europe
Replies: 42
Views: 5310

Re: using 110 power supply in Europe

W = V * A

A = W/V
by RudiV
Tue Apr 18, 2017 12:47 pm
Forum: Miscellaneous
Topic: using 110 power supply in Europe
Replies: 42
Views: 5310

Re: using 110 power supply in Europe

75RR wrote:Ok, I need at least 5A at 12v rather than at 30v, right?
10A (minimum would be 8.3A) and 12V, anything over 12V would be wasted.
by RudiV
Tue Apr 18, 2017 12:42 pm
Forum: Miscellaneous
Topic: using 110 power supply in Europe
Replies: 42
Views: 5310

Re: using 110 power supply in Europe

75RR wrote:Was just about to buy it :(
Thanks for the heads up.
It would drive the 100W light but only to 60W, not ideal....
by RudiV
Tue Apr 18, 2017 12:33 pm
Forum: Miscellaneous
Topic: using 110 power supply in Europe
Replies: 42
Views: 5310

Re: using 110 power supply in Europe

Thanks RudiV, Good to know. I was thinking of using it as a substitute for both my 12v 100w Wetzlar power supply and the Cornelsen. Save on weight and the number of power supplies. From what I have read it is old school quality. Thanks again! Pleasure! But I don't think it will work for the 12V 100...
by RudiV
Tue Apr 18, 2017 12:07 pm
Forum: Miscellaneous
Topic: using 110 power supply in Europe
Replies: 42
Views: 5310

Re: using 110 power supply in Europe

Can someone please confirm that this would work. Overkill? $100 delivered Suggestions ... http://www.ebay.co.uk/itm/Farnell-L30-5-30volt-5-amps-DC-Variable-Power-Supply-FULLY-TESTED-WORKING-/132162381917? + instruction manual in pdf: https://ia902608.us.archive.org/0/items/FarnellLSeriesBenchPowerS...
by RudiV
Tue Apr 18, 2017 3:56 am
Forum: Pictures and Videos
Topic: Hydra Eating Mosquito Larva - Video
Replies: 12
Views: 1762

Re: Hydra Eating Mosquito Larva - Video

Great work Johann!

Thanks for sharing,
Rudi
by RudiV
Tue Apr 18, 2017 2:53 am
Forum: Pictures and Videos
Topic: Pollen - Heteropyxis natalensis
Replies: 7
Views: 1022

Re: Pollen - Heteropyxis natalensis

Thanks everyone!
by RudiV
Mon Apr 17, 2017 5:36 pm
Forum: Pictures and Videos
Topic: Pollen - Heteropyxis natalensis
Replies: 7
Views: 1022

Re: Pollen - Heteropyxis natalensis

This one reminds me more of art than science....

20x objective, 34 image stack.
Image

Thanks for looking,
Rudi
by RudiV
Mon Apr 17, 2017 4:48 pm
Forum: Pictures and Videos
Topic: Pollen - Heteropyxis natalensis
Replies: 7
Views: 1022

Pollen - Heteropyxis natalensis

My Lavender tree (Heteropyxis natalensis) has started flowering. Here are a 2 images of the pollen and stamen. Stamen with pollen, Heteropyxis natalensis. 10x objective, 52 image stack. https://c1.staticflickr.com/4/3928/33286788493_b63ce8b7e7_c.jpg Pollen just above the stamen, 40x objective, 78 im...
by RudiV
Mon Apr 17, 2017 4:07 pm
Forum: Miscellaneous
Topic: using 110 power supply in Europe
Replies: 42
Views: 5310

Re: using 110 power supply in Europe

Thanks RudiV, prefer the thought of a transformer (linear) - still, I suppose with a bit of patience I could find some thing that would suit in Europe. Main problem is that I will not get much for the power supplies if I sell them locally, that and the fact that I have grown fond of them! If you ha...
by RudiV
Mon Apr 17, 2017 3:24 pm
Forum: Miscellaneous
Topic: using 110 power supply in Europe
Replies: 42
Views: 5310

Re: using 110 power supply in Europe

On second thoughts, since you only need 12V DC I won't bother with a step-down transformer, it would be more efficient, and not much more expensive, to simply get a 220V AC to 12V DC power supply of at least 5A. Many supplies like that can be found on the web. A switch-mode power supply will be smal...
by RudiV
Mon Apr 17, 2017 3:18 pm
Forum: Miscellaneous
Topic: using 110 power supply in Europe
Replies: 42
Views: 5310

Re: using 110 power supply in Europe

You can buy converters for about $20-25, Like this one: https://www.amazon.com/Voltage-Converter-220-240-110/dp/B001ES8YY6 Yes, this would work, just make sure you get one with a high enough rating, the 100W unit in the link won't work to run a 100W or higher input light, it is best to get one that...
by RudiV
Mon Apr 17, 2017 3:14 pm
Forum: Miscellaneous
Topic: using 110 power supply in Europe
Replies: 42
Views: 5310

Re: using 110 power supply in Europe

Hi Charles, the reviews on those type of converters are not very encouraging. Was hoping a European member had actually imported a 110v power supply and could comment on the experience. Since I import a lot of equipment from the USA I am stuck often with the 110V to 220V conversion (we have 220-240...
by RudiV
Sun Apr 16, 2017 5:23 pm
Forum: Illumination Techniques
Topic: Fluorescent capability?
Replies: 14
Views: 3057

Re: Fluorescent capability?

Hi Rudi, OH YES!!... This is it!!.... I am excited with you!... Looking forward to seeing photos from it.. Also what stains you have to purchase and where... BillT Hi BillT! Thanks, yes, excited as well, have spent quite a bit of time reading up on techniques and stains. I am now looking for suppli...
by RudiV
Sun Apr 16, 2017 8:39 am
Forum: Illumination Techniques
Topic: Fluorescent capability?
Replies: 14
Views: 3057

Re: Fluorescent capability?

I managed to get a good deal on 4 mercury lamps. Seems like there are 2 versions, a cheaper one (HBO 100 W/2) rated at 200 hours and a slightly more expensive one (HBO 103 W/2) that is rated for 300 hours life. According to the Olympus manual you can use either, at only a few $'s more I opted for th...