Search found 1480 matches

by charlie g
Sat Aug 01, 2015 2:52 pm
Forum: Sandbox
Topic: resize attempts!
Replies: 22
Views: 8249

Re: resize attempts!

this
by charlie g
Sat Aug 01, 2015 2:48 pm
Forum: Sandbox
Topic: resize attempts!
Replies: 22
Views: 8249

resize attempts!

this
by charlie g
Sat Aug 01, 2015 3:28 am
Forum: Pictures and Videos
Topic: Algae
Replies: 11
Views: 1793

Re: Algae

both terminal ends have those delightful dancing crystaloids..this is a desmid for certain! I guess we can look at image galleries of desmids to get an ID...at least a genus level ID. I'll offer my 2 cents ( read that as stick my neck out!) tommorow.

thanks for this image, charlie guevara
by charlie g
Sat Aug 01, 2015 2:22 am
Forum: Microscopes and optics
Topic: Water v. Oil immersion
Replies: 53
Views: 13501

Re: Water v. Oil immersion

Bravo to jwsmith for this thread ( I early on thanked jwsmith for the thread ). Not so fast gekko! Your opine that what is etched on the barrel of an objective has no relation to the microscope, the substage condenser, how a Hom. Imm. objective is used???...err..DIC objectives which you energize our...
by charlie g
Fri Jul 31, 2015 8:18 pm
Forum: Microscopes and optics
Topic: Water v. Oil immersion
Replies: 53
Views: 13501

Re: Water v. Oil immersion

Very intresting link to Jim Solliday's article on history of oil immersion objectives, thank you gekko. I find it (that article) totally silent on what is going on with substage condensers...in all that history. Homogeneous immersion is mentioned , but the article is silent on the condenser types, o...
by charlie g
Fri Jul 31, 2015 8:01 pm
Forum: Microscopes and optics
Topic: Water v. Oil immersion
Replies: 53
Views: 13501

Re: Water v. Oil immersion

ooops...it seems my link works....err...please visit it and all can see what Olympus defines homogenious immersion as...and all can see every one of you kind posters were correct in what you stated...and you all were very specific in your coments.

all the best, charlie guevara
by charlie g
Fri Jul 31, 2015 7:57 pm
Forum: Microscopes and optics
Topic: Water v. Oil immersion
Replies: 53
Views: 13501

Re: Water v. Oil immersion

http://www.olympusmicro.com/primer/anatomy/immersion.html I just visited and read the Olympus Resources tutorial on homogeneous immersion microscopy...everyone in this thread is correct according to Olympus tutorial! Too bad my links never work...perhaps someone can put up the funtioning link?! all ...
by charlie g
Fri Jul 31, 2015 7:23 pm
Forum: Microscopes and optics
Topic: Water v. Oil immersion
Replies: 53
Views: 13501

Re: Water v. Oil immersion

Hi again, gekko...again we are tap-dancing around 'the media used in the Hom. Imm.'...I trotted out numerous 'higher than air RI media'...simply to draw attention to in the same time period as my Hom. Imm. etched objective...other objectives were being etched with the spec:'oil imm.'. This leads me ...
by charlie g
Fri Jul 31, 2015 3:30 pm
Forum: Microscopes and optics
Topic: Water v. Oil immersion
Replies: 53
Views: 13501

Re: Water v. Oil immersion

At this point in the conversation, I sense I (we all perhaps) should trot off to easy online 'search of the literature' for why some objectives are with etched spec: oil, others glycerin, others WI, and then here I have a circa 1940's (?) : "Spencer Lens Co. Buffalo,N.Y" " Hom.Imm.-1.8mm-N.A. 1.25-9...
by charlie g
Thu Jul 30, 2015 4:19 pm
Forum: Resources (online, books etc.)
Topic: Biology major needing resources
Replies: 4
Views: 2217

Re: Biology major needing resources

Congradulations on your declared college major and declared college minor (already your plan has started!). I agree with Jim T...attend the pre class orientation, look at the variety of academic pathways within the two areas you mentioned, see how you will mix campus life with housing, work, etc..be...
by charlie g
Thu Jul 30, 2015 3:33 pm
Forum: Microscopes and optics
Topic: Water v. Oil immersion
Replies: 53
Views: 13501

Re: Water v. Oil immersion

Great specific experiences you both just gave me...thank you zzffnn and apochronaut. A kind microscopist from forum: "Microscope", Brian Matsumoto ( he has an excellent book out:"Practical Digital Photomicrography"...as much about microscopes as about image captures in life sciences...yes I purchase...
by charlie g
Wed Jul 29, 2015 4:41 pm
Forum: Microscopes and optics
Topic: Water v. Oil immersion
Replies: 53
Views: 13501

Re: Water v. Oil immersion

I low cost purchased LOMO 70X WI objective (no correction collar on this gem) a few years ago..but it's 34 mm RMS short barrel objective...so my work horse Labophot DIN 45 mm stand can't 'focus down enough' to use this gem...mind you...this LOMO functions excellent on my vintage 34mm RMS stands...si...
by charlie g
Wed Jul 29, 2015 3:52 pm
Forum: For forum members who want to buy and sell equipment
Topic: Nikon 20x E Plan and AO 40x objectives for sale/trade
Replies: 4
Views: 2736

Re: Nikon 20x E Plan and AO 40x objectives for sale/trade

Hello zzffnn...I'm the guy who just purchased your Labomed 60X objective ...based upon the spec you posted in this thread: .. ' 160 TL'. Please assure me that indeed it's a 160 TL 60X objective? thanks for your forum microscopy, charlie guevara
by charlie g
Mon Jul 27, 2015 9:06 pm
Forum: For forum members who want to buy and sell equipment
Topic: Any American Optical fans in NJ ?
Replies: 29
Views: 5592

Re: Any American Optical fans in NJ ?

Hi Dale...I'm in great pain...look at very last page of that auction link...Reichert/Austria trinoc!!! But one has to be close enough to pick the item up!! sigh, charlie guevara
by charlie g
Mon Jul 27, 2015 8:45 pm
Forum: Resources (online, books etc.)
Topic: Culturing one's own Copepods
Replies: 9
Views: 3062

Re: Culturing one's own Copepods

Thank you jwsmith! A sort of walk down memory lane to visit the link you share. Very practicle reasons this source and 'cook book' was compiled for. When West Nile virus first 'hit NY/Nj' we had die off of all sorts of crows,and jays...and we had mosquito control projects. In NJ there was an effort ...
by charlie g
Mon Jul 27, 2015 8:01 pm
Forum: Beginner's corner
Topic: How to solve a problem related to oiling the condenser to the slide
Replies: 12
Views: 3603

Re: How to solve a problem related to oiling the condenser to the slide

Hello, gekko, I just went and measured my Labophot (my work horse stand usually) stage 'portal opening'...it measures 2 cmX7 cm in dimension! So you have 15 mm to roamX65mm with a slide oiled to the condenser...for me that's a lot of roaming space. If you need more area to observe...use a glass squa...
by charlie g
Sun Jul 26, 2015 12:45 pm
Forum: Beginner's corner
Topic: Seeking advice on my first microscope
Replies: 18
Views: 4587

Re: Seeking advice on my first microscope

ooops! I meant sturdy biological microscopes.
by charlie g
Sun Jul 26, 2015 12:44 pm
Forum: Beginner's corner
Topic: Seeking advice on my first microscope
Replies: 18
Views: 4587

Re: Seeking advice on my first microscope

Welcome, Cosmic-mote. Like Dennis...I have found study biological microscopes on eBay,,,very low cost...in fact I have too many of them! charlie guevara
by charlie g
Sat Jul 25, 2015 1:27 am
Forum: Pictures and Videos
Topic: Paramécie
Replies: 6
Views: 1686

Re: Paramécie

Magnifique !! Merci, vasselie...for your ciliate encounteur. My intrest and the charm your Parame'cie draw me to...are those collections of internal inclusions which both images suggest are : same size, same location in the organism...and not ingested 'food'. thank you for this Parame'cie to ponder....
by charlie g
Sat Jul 25, 2015 12:01 am
Forum: Pictures and Videos
Topic: Haematococcus under different lighting methods
Replies: 25
Views: 4021

Re: Haematococcus under different lighting methods

All these images make me hungry, gekko! A scoop of these on a cracker , and a dry champaigne! The colors are delicious...and that rich antioxidant pigment (astazanthine) is used by so many diverse organisms (flamingo birds, crusteaceans, etc..). thanks for this eye candy...charlie guevara
by charlie g
Fri Jul 24, 2015 11:48 pm
Forum: Pictures and Videos
Topic: Hydrodictyon in Different Lighting
Replies: 12
Views: 2583

Re: Hydrodictyon in Different Lighting

As already said...beautiful algae you give here...thank you,Jim T. I'm fond of your DF image...those marvelous struts, the symetries...it's like heading to dock at a space station,Jim T ...beautiful images...charlie guevara
by charlie g
Mon Jul 20, 2015 2:03 pm
Forum: Pictures and Videos
Topic: Scuticociliates
Replies: 8
Views: 1711

Re: Scuticociliates

It's our shared microscopy world views that are a great part of this forum experience (my opinion), gecko...pretty please do not ever sense I'm a taxonomist! I'm sure you'll notice in so many of my shared microscopy world views...I omit a binomial (Genus,species) of the protists, or other meiofauna ...
by charlie g
Sun Jul 19, 2015 2:36 pm
Forum: Pictures and Videos
Topic: Scuticociliates
Replies: 8
Views: 1711

Re: Scuticociliates

Nice ciliates,gekko...with all the mosquitos ( I,m still itchy on my knuckles after yesterdays chores and doggie hike)...with all those mosquitoes...it's perhaps good you do not have a home bird-bath. But if you ever change your mind...terra cotta basins are low cost...and you place two rather heavy...
by charlie g
Sun Jul 19, 2015 1:38 pm
Forum: Pictures and Videos
Topic: P-protein strand from tobacco
Replies: 5
Views: 1080

Re: P-protein strand from tobacco

thank you, caterpillar-guy. I'm a fossil...I recall my delight at the early TEM DNA images ( by Cairns??) in my genetics textbook. It is so fascinating to have your walking us through the protocol you used to collect the specimens..and time frames to achieve each step. I'm impressed at the issue of ...
by charlie g
Sun Jul 19, 2015 1:18 pm
Forum: About the website, the magazine and this forum
Topic: change my password...please advise.
Replies: 2
Views: 3553

Re: change my password...please advise.

Thanks, BillT! I did not 'see' that ...even though I was 'looking' at it the first time...all the best, charlie guevara
by charlie g
Sat Jul 18, 2015 3:11 pm
Forum: Introduce yourself
Topic: New member from Canada, eh..
Replies: 12
Views: 3907

Re: New member from Canada, eh..

Hello and welcome, boomed. Sorry for your recent loss. Thank you for sharing your very intresting paths with microscopy. I enjoy freshwater and wetlands microscopy here in finger lakes/US. We love the St.Lawrence River, and Canada in July and August. My major headache at the bench is dust specs in m...
by charlie g
Sat Jul 18, 2015 2:24 pm
Forum: About the website, the magazine and this forum
Topic: change my password...please advise.
Replies: 2
Views: 3553

change my password...please advise.

Please offer direction...I need to change my forum password! I went to: User Control Panel...I could not find out how to change my password there. Thanks for any assistance folks...charlie guevara
by charlie g
Sat Jun 06, 2015 5:07 pm
Forum: Pictures and Videos
Topic: Haematococcus (using different lighting methods) [added short video]
Replies: 9
Views: 1649

Re: Haematococcus (using different lighting methods)

#3 is my favorite too! Thank you, gekko! charlie guevara
by charlie g
Sat Jun 06, 2015 1:59 pm
Forum: My microscope
Topic: New arrival direct from Moscow
Replies: 32
Views: 8518

Re: New arrival direct from Moscow

Crater Eddie wrote:
75RR wrote:"Boris" is a perfect fit. Say hi from me. ;)
I'm sure if he could, Boris would say HI back, as would his younger cousin Natasha. :mrgreen:
Congrats Crater Eddie! Borish and Natasha are sweet! charlie guevara
by charlie g
Sat Jun 06, 2015 1:50 pm
Forum: Introduce yourself
Topic: new world
Replies: 7
Views: 2713

Re: new world

Welcome...I hope you get a niece comfortable table spot to enjoy your microscopic adventures! charlie guevara