Search found 4701 matches
- Tue Jan 17, 2017 5:00 pm
- Forum: Pictures and Videos
- Topic: Pediastrum
- Replies: 10
- Views: 4565
Re: Pediastrum
Excellent images! What excitation wavelength did you use? I assume that you used epi-illumnation for the excitation? If so, how would DIC work then? Please forgive me if my questions are too dumb... Also if you've already answered them elsewhere, in which case please only give the link (I have not b...
- Tue Jan 17, 2017 4:47 pm
- Forum: Miscellaneous
- Topic: Re-rated bulb life formula
- Replies: 26
- Views: 10926
Re: Re-rated bulb life formula
For what it's worth: Most inexpensive voltmeters measuring AC voltage assume that the waveform is sinusoidal (at least that was the situation that obtained some years ago-- I'm not sure if the new advances in chips have changed the situation: hopefully someone would bring us up to date). If the wave...
- Thu Dec 22, 2016 10:41 pm
- Forum: My microscope
- Topic: My Kit
- Replies: 222
- Views: 89003
Re: My Kit
Gekko, no worries about the new line of discussion. This thread has covered a lot of ground, all of it, including green filters, is interesting. Go for it! Rod If I may for what it's worth, I would like to add that I just got the Lee #124 filter recommended by zzffnn, and I compared it with the Nik...
- Tue Dec 20, 2016 11:44 pm
- Forum: Pictures and Videos
- Topic: Another shell. Pearlescent marine.
- Replies: 7
- Views: 3383
Re: Another shell. Pearlescent marine.
Wonderful job and amazing perseverance! Thousands of images!!!
- Tue Dec 20, 2016 11:38 pm
- Forum: Pictures and Videos
- Topic: More From Leisure Lake
- Replies: 16
- Views: 6771
Re: More From Leisure Lake
Whoa these are really cool. I want to learn how to take pictures like this. Thanks ISSS. It is pretty straightforward darkfield microscopy and imaging. The Diatom part I have documented with lots of help from folks here in the "Doing Diatoms" thread. You can certainly get there! Happy to help if I ...
- Tue Dec 20, 2016 6:55 pm
- Forum: Pictures and Videos
- Topic: A dark field Cheshire cat smile!
- Replies: 5
- Views: 2764
Re: A dark field Cheshire cat smile!
Very nice picture, Charlie, although I wish it were larger. Very well exposed, too, something I find difficult to do in darkfield.
- Tue Dec 20, 2016 6:52 pm
- Forum: Miscellaneous
- Topic: I enjoy growing duck weed...indoors and outdoors.
- Replies: 12
- Views: 6206
Re: I enjoy growing duck weed...indoors and outdoors.
Apologies, Charlie, for the delay in replying. Thank you for confirming that my picture is that of duckweed root, and, especially for pointing out Leeuwenhoek's image for comparison. It is amazing what Leeuwenhoek could do with a simple lens. This confirms by belief that in large measure it is not t...
- Tue Dec 20, 2016 6:40 pm
- Forum: Pictures and Videos
- Topic: More From Leisure Lake
- Replies: 16
- Views: 6771
Re: More From Leisure Lake
Another superb set of diatom images. Excellent, beautiful work, Rod.
- Tue Dec 20, 2016 6:37 pm
- Forum: Pictures and Videos
- Topic: Silicoflagellate Distephanus/Dictyocha speculum.
- Replies: 9
- Views: 4012
Re: Silicoflagellate Distephanus/Dictyocha speculum.
Superb image.
- Tue Dec 20, 2016 6:36 pm
- Forum: Microscopy accessories
- Topic: Looking for a magic filter (or something like that)
- Replies: 4
- Views: 4225
Re: Looking for a magic filter (or something like that)
You could also try various concentrations of food dye of various colors in a small Petri dish below the condenser. Or is that not what you are asking about?
- Tue Dec 20, 2016 6:35 pm
- Forum: Introduce yourself
- Topic: Hello Everyone
- Replies: 7
- Views: 5011
Re: Hello Everyone
Welcome, Catherine. I agree that neither formal education nor an expensive microscope are necessary to enjoy many hours of microscopy fun. I hope your dog recovers well.
- Mon Dec 19, 2016 11:18 pm
- Forum: Introduce yourself
- Topic: Awaited hobby!
- Replies: 10
- Views: 6147
Re: Awaited hobby!
Welcome, Xito. I strongly agree with JimT about getting a binocular microscope. In fact, if you plan to take photographs through the microscope, I would highly recommend a trinocular.
- Mon Dec 19, 2016 11:14 pm
- Forum: Camera systems and imaging
- Topic: Questions about the use of an eyepiece as a photo projection lens
- Replies: 3
- Views: 3452
Re: Questions about the use of an eyepiece as a photo projection lens
Thank you 75RR for your reply. Yes I know they work well but I was wondering (1) how they compare to generic projection lenses and whether they may be as good as the manufacturer's own compensating projection lenses and (2) whether their performance (image quality) deteriorates in theory as they are...
- Mon Dec 19, 2016 2:49 pm
- Forum: Camera systems and imaging
- Topic: Questions about the use of an eyepiece as a photo projection lens
- Replies: 3
- Views: 3452
Questions about the use of an eyepiece as a photo projection lens
This question arose in my mind when reading the discussion about using a projection lens with Rod's AO microscope ( http://www.microbehunter.com/microscopy-forum/viewtopic.php?f=24&t=776 ). I had always assumed, without real knowledge, that in the case of microscopes that require compensating eyepie...
- Mon Dec 19, 2016 2:03 pm
- Forum: Camera systems and imaging
- Topic: What Is This?? Paging Mr. Apochronaut!
- Replies: 9
- Views: 5700
Re: What Is This?? Paging Mr. Apochronaut!
How is it obvious that it's a low power eyepiece? Kurt, I thought it was an eyepiece because it is shaped like a long eyepiece and the diameter of the part that inserts into the microscope looks the same as the other two eyepieces in the picture. It looked to me like a very low power eyepiece becau...
- Mon Dec 19, 2016 12:42 am
- Forum: Miscellaneous
- Topic: I enjoy growing duck weed...indoors and outdoors.
- Replies: 12
- Views: 6206
Re: I enjoy growing duck weed...indoors and outdoors.
Thank you, charlie, for, as usual, an interesting, informative, and helpful post with nice illustrative pictures. Some time ago I took some pictures of what I thought was duckweed root under the microscope, and I've always wondered if my identification was correct. Here is a link: http://imgur.com/9...
- Mon Dec 19, 2016 12:17 am
- Forum: Camera systems and imaging
- Topic: What Is This?? Paging Mr. Apochronaut!
- Replies: 9
- Views: 5700
Re: What Is This?? Paging Mr. Apochronaut!
Please excuse what is probably a dumb question: since it looks like a very low power eyepiece, could it be a projection eyepiece used with a prism or mirror to project an image on a wall?
- Sat Dec 17, 2016 11:58 pm
- Forum: Microscopes and optics
- Topic: Stuck spring objective -- any way to free up?
- Replies: 14
- Views: 9289
Re: Stuck spring objective -- any way to free up?
Thank you, lorez. That is very helpful (and my apologies to PeterM for butting in).
- Sat Dec 17, 2016 11:49 pm
- Forum: My microscope
- Topic: My Kit
- Replies: 222
- Views: 89003
Re: My Kit
Rod, forgive me for hijacking your post. I didn't mean to, it just happened :) . zzffnn, many thanks for your very helpful reply. My Nikon GIF filter passes also yellow and some red (I used an inexpensive spectroscope to test it). I've not been able to find a curve for spectral response of my Nikon ...
- Sat Dec 17, 2016 11:12 pm
- Forum: My microscope
- Topic: My Kit
- Replies: 222
- Views: 89003
Re: My Kit
First, beautiful work, Rod, as always. I am totally unqualified to comment on differences between oiled and dry condenser use on account of my bad vision, so, not surprisingly, I cannot discern any difference whatsoever in your examples. But my question is this: you can make the comparison with the ...
- Sat Dec 17, 2016 10:40 pm
- Forum: Pictures and Videos
- Topic: Diatoms from Leisure Lake
- Replies: 10
- Views: 4576
Re: Diatoms from Leisure Lake
Superb work. Beautiful, very detailed images with excellent resolution.
- Sat Dec 17, 2016 3:48 pm
- Forum: Microscopes and optics
- Topic: Stuck spring objective -- any way to free up?
- Replies: 14
- Views: 9289
Re: Stuck spring objective -- any way to free up?
The lighter fluid obviously evaporates very quickly, so your point of wicking away the gunk+lighter fluid after repeatedly applying it is what I usually do with my partially sticking spring-loaded objective. If the optics are enclosed and sealed in an inner barrel, this should be safe to do, I think...
- Sat Dec 17, 2016 3:41 pm
- Forum: Pictures and Videos
- Topic: Coral fungus
- Replies: 3
- Views: 2279
Re: Coral fungus
I agree with the comments above.
- Fri Dec 16, 2016 10:45 pm
- Forum: Pictures and Videos
- Topic: Can You Guess What It Is?
- Replies: 6
- Views: 2777
Re: Can You Guess What It Is?
Very interesting. I would never have guessed.
- Fri Dec 16, 2016 10:44 pm
- Forum: Pictures and Videos
- Topic: Still Another Poinsettia
- Replies: 9
- Views: 4280
Re: Still Another Poinsettia
... and still another very beautiful set of images. Really good work.
- Fri Dec 16, 2016 10:42 pm
- Forum: Microscopes and optics
- Topic: Stuck spring objective -- any way to free up?
- Replies: 14
- Views: 9289
Re: Stuck spring objective -- any way to free up?
Thank you for the update: it is useful to know what worked: it is good to learn from your experience. I personally would have not lubricated it with oil but left it dry, although I'm talking without real knowledge. I hope that lorez might comment.
- Fri Dec 16, 2016 1:04 am
- Forum: Pictures and Videos
- Topic: Another Poinsettia
- Replies: 4
- Views: 2147
Re: Another Poinsettia
As usual, beautiful! I was surprised as to how much color they retain (and it is a beautiful green).
- Fri Dec 16, 2016 1:02 am
- Forum: Miscellaneous
- Topic: A better freeware to post images than Photobucket
- Replies: 6
- Views: 4102
Re: A better freeware to post images than Photobucket
For what it's worth, I use imgur. It is fine for hosting images, but, at least at present (they may be working on the software), they are not good for non-registered users to look at your images, as you can see from mine: http://micritter.imgur.com/all where, in order to look at a picture you need t...
- Wed Dec 14, 2016 5:16 pm
- Forum: My microscope
- Topic: My Kit
- Replies: 222
- Views: 89003
Re: My Kit
Thanks Gekko. If by the lens, you mean the projection lens, I can't comment yet, as the way it is configured, I am not sure I can remove the lens from the adapter. I will have to investigate that. My fault, Rod: I thought that the adapter did not include a lens . Sorry about that. I certainly did n...
- Wed Dec 14, 2016 12:58 pm
- Forum: Pictures and Videos
- Topic: Amoeba with algae
- Replies: 9
- Views: 3965
Re: Amoeba with algae
I think it depends what you want to do with the images. If you want to make large prints I can see that. For posting on the forum, you will be using less than 1 megapixel anyway so HD would, I think, be fine, unless you need to make heavy crops. Or is there something I am missing?