November 18, 2017, 08:30:50 PM

Recent Posts

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Reviews / Re: Canon 85mm f/1.4L IS review by Sarah Seal.
« Last post by Viggo on Today at 02:03:26 PM »
Great! Thanks for posting  :D
EOS Bodies - For Stills / Re: 5Dsr MP-E 65 z-stacking experiments.
« Last post by Zeidora on Today at 02:02:47 PM »
@Zeidora are you still using AP to finish off your images?
Yep, using AP exclusively. By now I am sufficiently used to AP that PS seems strange when I have to use it at work. DxO optics Pro for RAW conversion. My OS 10.10 is not compatible for the new DxO (Grrr!) but upgrading OS would make a bunch of other software incompatible (Word, FileMaker, QuarkXPress). Will wait for a year till the new Mac Pro comes out and then face the music.
Now I just have to learn Coda to ditch Dreamweaver, and I am Adobe-free! :-)
Landscape / Re: Mountains, Lakes and Rivers
« Last post by dhr90 on Today at 01:59:55 PM »
Had a play with a polariser, hence the uneven sky tone. Heybridge Basin in Essex, UK

Heybridge Basin by Matt, on Flickr

Heybridge Basin by Matt, on Flickr

Heybridge Basin by Matt, on Flickr
Black & White / Re: Black and White Landscapes!
« Last post by dhr90 on Today at 01:56:38 PM »
Its been a while since I've seen my local river so calm.

Heybridge Basin by Matt, on Flickr

Heybridge Basin by Matt, on Flickr
EOS Bodies - For Stills / Re: 5Dsr MP-E 65 z-stacking experiments.
« Last post by Zeidora on Today at 01:53:40 PM »
@zeidora: I seem to understand form your comments that you are proper microscopist but I don't want to bother other readers with technical stuff.
I am interested in monitoring crystals during solid-state reactions. In some case these occur by varying temperature, in other cases by exposing crystals to humidity, pressure, or different gasses including HCl and ammonia, through the use of special cells that I have designed. Now for some reason people don't want me to use HCl in their ESEM  :-X.
Being more serious most of these reactions produce a change of the crystal colour that electron microscopy cannot reveal.

Anyway if as you shouw above the lens resolution is the limiting factor then the test results of DoX mark suggest that I'm better off with a 6D or 5D and an extender than the 5DS(r).

Yep, no HCl in "my" SEM either! I only brought up SEM because you mentioned TEM. Still waiting for the color SEM as well.

Re 5D vs 5Ds[R], does not matter really. Either you use the 5DsR and get low mag, high MP image, or you use 5D ... and get higher mag, lower MP image. The structure will be shown at the same pixel dimensions at the edge of resolution, once you factor in absolute pixel size.

I gather you have a cell with a window, and you want to image your crystals through that window. I still think long WD epi compound objective is your best bet; for NA<0.3 you can also use regular 0.17-coverslip-objectives [Maybe you have seen this British guy who does z-stack-stitch gigapixel images of insects using compound microscope lenses on dSLR.] You will have to take into account magnification change due to the cell window. Same problem as with underwater photography and the window on the lens ports. You will have to include a scale bar with your crystal, or separately photograph a micrometer in your cell for calibration.

Illumination may be another problem depending on the design of your cell. You did not mention whether you do trans or epi illumination. I tried epi using compound-epi-pathway, but for 3D structures it resulted in too flat illumination. Now use dual goosenecks diffused with ping-pong balls and am very happy with results. With trans you have all the polarization options. Cross polarization with epi is another option and may help eliminating specular highlights on crystal facets.
Lenses / Re: Patent: Canon EF-M 15-45mm f/1.8-3.5
« Last post by woodman411 on Today at 01:53:21 PM »
I hope this materializes. The current efm 18-55 and 15-45 are underwhelming. To be fair, their market value is less than $150 US, so they are budget class. Would love to see a mid-to-high range zoom in efm-like size, would probably be about 400-500 US dollars if this goes through.
EOS Bodies / Re: Patent: Canon Application for a Hybrid Viewfinder
« Last post by traveller on Today at 01:43:43 PM »
This looks like a very complicated and expensive solution, not to mention delicate. It suggests that fitting a hybrid viewfinder is a bit more challenging than simply plonking a screen inside the prism housing.

I wonder if a better solution would simply be to fit a hot shoe with a display connector, like the EOS-M3. If the EVF is more important to your shooting style than this, then probably a mirrorless camera is the answer.
EOS-M / Re: Lady Tamron is a cruel mistress
« Last post by axtstern on Today at 01:29:22 PM »
Yes... The spell checker... I use an Oppo R11+. That is a Chinese Operating system with a forced on German keyboard layout doing German auto correct while typing English. Because of the Chinese input engine spell check "coorrects" words after I have typed two or more words ahead already.
Lenses / Re: Patent: Canon EF-M 15-45mm f/1.8-3.5
« Last post by JohanCruyff on Today at 01:28:43 PM »
It seems that Fujio Mitarai has been informed that I bought a Canon EOS M6 last thursday!  ;D
Thank you Fujio!
Lenses / Re: Patent: Canon EF-M 15-45mm f/1.8-3.5
« Last post by neuroanatomist on Today at 01:26:40 PM »
Finally EF-M might be getting some good zoom lenses.

The M11-22 is very good, better than the EF-S UWA zooms.  But I'd certainly be interested in this as a walk around lens.
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