Search found 7593 matches

by 75RR
Tue Aug 04, 2015 12:19 pm
Forum: Pictures and Videos
Topic: alga
Replies: 21
Views: 2670

Re: alga

Thanks Charles. 2 does seem slightly out of focus.
... three might be more interesting if you put in a full wave plate (Rot 1).
Apart from the analyzer in the Optovar I only have a polarized filter I recovered from a broken Mobile Phone screen.
by 75RR
Tue Aug 04, 2015 11:23 am
Forum: Microscopes and optics
Topic: Lux Meter readings of a LED conversion
Replies: 8
Views: 2706

Re: Lux Meter readings of a LED conversion

UPDATE: Luxmeter arrived, slightly larger and older than I thought. In perfect working order. Only caveat is that it is not sensitive enough, scale in 5 Lux steps min. Range is: 0 - 300, 0 - 1000 and 0 - 3000 Lux Note: Battery for scale only, it does not use batteries. Luxmeter pdf: http://tmi.yokog...
by 75RR
Tue Aug 04, 2015 10:44 am
Forum: Pictures and Videos
Topic: alga
Replies: 21
Views: 2670

Re: alga

Thanks zzffnn
by 75RR
Tue Aug 04, 2015 12:56 am
Forum: Pictures and Videos
Topic: alga
Replies: 21
Views: 2670

Re: alga

Thanks JimT, mrsonchus and Rodney. Very kind!
by 75RR
Mon Aug 03, 2015 11:47 pm
Forum: Pictures and Videos
Topic: alga
Replies: 21
Views: 2670

alga

40x/0,65 Ph2*1.25, 5µm alga width, Brightfield and Oblique and Polarized and Phase, Single images in Photoshop. Smallest I have photographed yet. The oogonium (bulb like part) is just under 20µm. http://i1368.photobucket.com/albums/ag171/mapologo/Alga18a_zpslwaxtqdh.jpg http://i1368.photobucket.com/...
by 75RR
Mon Aug 03, 2015 1:22 am
Forum: Home-made microscope adaptations
Topic: LED
Replies: 7
Views: 3358

Re: LED

This is the one I bought. As you can see the one from RadioShack was about the same price.

http://www.ebay.com/itm/Hot-Cree-XLamp- ... AQ:US:1123
by 75RR
Sun Aug 02, 2015 9:53 pm
Forum: Home-made microscope adaptations
Topic: LED
Replies: 7
Views: 3358

Re: LED

I find that getting one of the brand LEDs is worth the extra cost as they not only have a very large selection, enabling one to tailor the LEDs to ones needs, but they also come with documentation. This is important as it avoids potential unknowns such as the amount of UV it might emit. Have a look ...
by 75RR
Sun Aug 02, 2015 9:33 pm
Forum: Microscopy accessories
Topic: My New Microtome
Replies: 80
Views: 19471

Re: My New Microtome

John, congratulations! You fully deserve this.
Seb28, I say the same to you: congratulations, and you also fully deserve it.
Agree with gekko. Merited by all that hard work and boundless enthusiasm. Congratulations to both of you.
by 75RR
Sun Aug 02, 2015 12:56 pm
Forum: Home-made microscope adaptations
Topic: Possible 10 Watt LED Light Source..
Replies: 14
Views: 5476

Re: Possible 10 Watt LED Light Source..

I can tell you that I tried some laser printer transparencies in an inkjet printer. It looked good for a while, but the ink quickly smeared and made quite a mess. Laser printer on Inkjet transparencies work better. Either way best to print two of each and stick them together - ink on the inside. Th...
by 75RR
Sat Aug 01, 2015 1:11 pm
Forum: Pictures and Videos
Topic: Diatomées
Replies: 6
Views: 1311

Re: Diatomées

Nice image of a wide selection and concentration of diatoms. Are you scraping rocks to get them?
by 75RR
Sat Aug 01, 2015 1:06 pm
Forum: Pictures and Videos
Topic: Chironomidae
Replies: 12
Views: 1974

Re: Chironomidae

Wonderful detail and sharpness.
by 75RR
Sat Aug 01, 2015 1:02 pm
Forum: Pictures and Videos
Topic: Vorticella (video)
Replies: 47
Views: 6268

Re: Vorticella (video)

Very nice video (vorticella), COL/Oblique works very well.
Curiously I could not however distinguish between them.
Thanks for reminding me about COL :)
by 75RR
Mon Jul 27, 2015 2:16 pm
Forum: Pictures and Videos
Topic: Found in saltwater aquarium...
Replies: 5
Views: 1182

Re: Found in saltwater aquarium...

Hi houstontx, interesting samples. I have never tried to peer into salt water so I do not know what to expect. I have found that in freshwater samples things change over time, so you might want to put the samples aside and have another look in a couple of weeks. Like your first image and the two alg...
by 75RR
Wed Jul 22, 2015 7:51 pm
Forum: Pictures and Videos
Topic: Paramécie
Replies: 6
Views: 1690

Re: Paramécie

Very nice.
Thought he was looking a little wide.
You are right, they do not stop and smile for the camera very often.
Sometimes the only way is to wait until they are pinned by the coverslip.
by 75RR
Wed Jul 22, 2015 6:21 pm
Forum: Pictures and Videos
Topic: Zygnema Akinetes ?
Replies: 4
Views: 925

Re: Zygnema Akinetes ?

Thanks gekko, how about the Zygnema part? Not sure about that either.
Perhaps we should say that some type of alga is ... (as long as it is not a cyanobacteria that is)
Like how the Phase Contrast complements the Oblique.
by 75RR
Wed Jul 22, 2015 5:58 pm
Forum: Pictures and Videos
Topic: Zygnema Akinetes ?
Replies: 4
Views: 925

Zygnema Akinetes ?

40x*1.25, 20µm (Alga sheath), Oblique and Phase, 10 and 8 image stacks in Photoshop Not sure if this is a Zygnema forming Akinetes , would be great if it were. Does anyone know? http://i1368.photobucket.com/albums/ag171/mapologo/Alga20microma_zpscut8f7hj.jpg http://i1368.photobucket.com/albums/ag171...
by 75RR
Tue Jul 21, 2015 8:35 pm
Forum: Pictures and Videos
Topic: Cyclops
Replies: 8
Views: 1379

Re: Cyclops

Nice darkfield
by 75RR
Tue Jul 21, 2015 4:28 pm
Forum: Pictures and Videos
Topic: Haematococcus under different lighting methods
Replies: 25
Views: 4045

Re: Haematococcus under different lighting methods

1 is brightfield, 3 is DIC, and 6 is 5a?
by 75RR
Tue Jul 21, 2015 4:15 pm
Forum: Pictures and Videos
Topic: Haematococcus under different lighting methods
Replies: 25
Views: 4045

Re: Haematococcus under different lighting methods

Great images.
Wonderful to see such a range of techniques on a single subject.
Practically a course in illumination all on its own.
I am going to go for 1, 3 and 6
by 75RR
Tue Jul 21, 2015 4:08 pm
Forum: Pictures and Videos
Topic: Rotifère
Replies: 6
Views: 1060

Re: Rotifère

Excellent sharpness and clarity. Great view of the eye in the last one. I think such optical sections give a different view (probably better) than does a focus stack. I think each one has its place, what is important is that each technique be able to show something that can not be seen clearly by th...
by 75RR
Mon Jul 20, 2015 11:44 pm
Forum: Pictures and Videos
Topic: Rotifers
Replies: 7
Views: 1413

Re: Rotifers

gekko is right it does look like art. I can see how turning them 180 might work, they do look like they are falling.
You also have some interesting alga there.
by 75RR
Mon Jul 20, 2015 9:54 pm
Forum: Pictures and Videos
Topic: Haematococcus
Replies: 8
Views: 1688

Re: Haematococcus

Beautiful photograph. Thought it was DIC!
by 75RR
Mon Jul 20, 2015 2:02 pm
Forum: Pictures and Videos
Topic: Rotifère
Replies: 3
Views: 923

Re: Rotifère

Indeed, very nice. Were these in glycerine?
by 75RR
Mon Jul 20, 2015 1:57 pm
Forum: Pictures and Videos
Topic: Melosira
Replies: 5
Views: 1297

Re: Melosira

Agree with gekko. Well done.
by 75RR
Mon Jul 20, 2015 1:54 pm
Forum: Home-made microscope adaptations
Topic: Possible 10 Watt LED Light Source..
Replies: 14
Views: 5476

Re: Possible 10 Watt LED Light Source..

Thanks zzffnn, will give your gradients a try.
by 75RR
Mon Jul 20, 2015 11:34 am
Forum: Home-made microscope adaptations
Topic: Possible 10 Watt LED Light Source..
Replies: 14
Views: 5476

Re: Possible 10 Watt LED Light Source..

Hi zzffnn,
thanks for the link to gradient jpg: http://www.photomacrography.net/forum/v ... ht=#173390
Do you have any images in which they are used?

On the two LED headlamps - I tried a similar one and found banding on all but the max setting, did you also have this problem?
by 75RR
Mon Jul 20, 2015 3:57 am
Forum: Pictures and Videos
Topic: Oedogonium
Replies: 3
Views: 928

Oedogonium

16x, 15µm, Oblique and Darkfield, 11 and 8 image stacks in Photoshop Showing cell swollen at distal end (capitellate) http://protist.i.hosei.ac.jp/pdb/images/Chlorophyta/Oedogonium/sp_06.html http://i1368.photobucket.com/albums/ag171/mapologo/Alga15microm-1_zpsvnbuasut.jpg http://i1368.photobucket.c...
by 75RR
Mon Jul 20, 2015 2:55 am
Forum: Microscopes and optics
Topic: My light cone does not appear to be centered
Replies: 42
Views: 7886

Re: My light cone does not appear to be centered

...yet a resounding "NO DONT TOUCH IT!" call out from everyone here. I believe that "do not touch" was before the condenser was shown to be off-centre and before you had a method to centre it. Do not know how practical it would be to realign the condenser for every objective so might be best to fin...
by 75RR
Mon Jul 20, 2015 2:30 am
Forum: Pictures and Videos
Topic: Cyanobacteria and friend
Replies: 5
Views: 933

Re: Cyanobacteria and friend

Thanks gekko. Have seen the lighter band before, but had not noticed the purple tinge previously, I suppose it could be a colour distortion. There is a definite sweet-spot where the light intensity, the diaphragm opening and the Oblique setting combine perfectly. Found it quickly this time. I tend t...