Search found 673 matches

by ChrisLilley
Thu Nov 03, 2011 4:50 pm
Forum: Frequently Asked Questions (FAQs)
Topic: FAQ: How can I hook a microscope objective to my camera?
Replies: 91
Views: 370012

Re: FAQ: How can I hook a microscope objective to my camera?

Nikon D90 ? Will not meter. D40, D40x, D60, D3000, D3100, D70, D80, D90, D5000, D5100, D100 will not meter. D200, D300, D300s, D7000, D700, D3, D3s, D3x will meter But as I said, you are in mode M either way so the lack of metering is not really a problem and you are better to judge the lighting fr...
by ChrisLilley
Thu Nov 03, 2011 9:57 am
Forum: Frequently Asked Questions (FAQs)
Topic: FAQ: How can I hook a microscope objective to my camera?
Replies: 91
Views: 370012

Re: FAQ: How can I hook a microscope objective to my camera?

[ I am not taking in account the "chipped" adapter that accepts M42x1 threaded optics on the lens side, and presents an interface to the camera. It seems that for Nikon this is less suitable and not really needed. I have read that some Nikon bodies don't meter without a chip while others like D300 ...
by ChrisLilley
Sun Oct 23, 2011 2:09 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Vignetting
Replies: 25
Views: 7938

Those lenses have quite a reputation and seem to be rather cheap used. Not bad for something that has essentially remained unchanged for about 30 years. Any reason to differentiate between the AI and the AI-s? (or even the pre-AI version) The differences between AI and AIS mainly apply to Nikon fil...
by ChrisLilley
Fri Oct 21, 2011 6:24 am
Forum: Equipment Discussions
Topic: Campden micro-positioner
Replies: 1
Views: 968

That looks great. Those are three fine Mitutoyo micrometer heads right there.
by ChrisLilley
Wed Oct 12, 2011 8:52 am
Forum: Equipment Discussions
Topic: Sensor Dust and Magnification
Replies: 27
Views: 4458

rjlittlefield wrote:So it sticks to the sensor? Now that is interesting. I don't know what it means, but it sure is interesting!
Might it mean that the sensor plane is not exactly parallel to the lens mount, but is slightly tilted?

Edit: no, because photos with no optics also show colour shifts.
by ChrisLilley
Sat Oct 08, 2011 1:28 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Stacking step for microscope objective
Replies: 5
Views: 2131

seta666 wrote: For Field work I take with me a small table in mm based on Lefkowitz
2*CoC*f*(m+1)/(m*m) I use a CoC of 0,030
Image
Javier
The value for 5x f/8 appears to be out by a factor of 10 (0.10 not 0.01) compare adjoining 0.09 and 0.16.
by ChrisLilley
Sat Oct 08, 2011 11:31 am
Forum: Equipment Exchange
Topic: SOLD: Zeiss MP100/2.8 (C/Y)
Replies: 6
Views: 9510

If you will pardon the intrusion, it may be worth pointing out a couple of things about this lens. Firstly, the Contax/Yashica (C/Y) mount can be easily used on Canon, and I believe Pentax, digital SLR while retaining infinity focus and without additional optics, as the register distance of C/Y is g...
by ChrisLilley
Thu Oct 06, 2011 2:05 pm
Forum: Equipment Discussions
Topic: Windows 7 Magnifier Tool
Replies: 11
Views: 1774

Aha. Thanks for the supplemental details.

Yes, I exited it in small box mode. Also, I have (by conscious choice) few desktop icons, and they are auto-arrranged.
by ChrisLilley
Thu Oct 06, 2011 1:45 pm
Forum: Equipment Discussions
Topic: Long CA effect on apparent color
Replies: 9
Views: 1544

I am assuming this is due to Long CA since the Apochromatic lenses I own don't do this at all. They do do it, in fact. Don't get me wrong, I own apochromatic lenses and love using them but they are merely better, not perfect. They exhibit the same effect but to a lesser degree (and affecting differ...
by ChrisLilley
Thu Oct 06, 2011 1:42 pm
Forum: Equipment Discussions
Topic: Long CA effect on apparent color
Replies: 9
Views: 1544

Re: Long CA effect on apparent color

I've noticed some lenses have a strong Long CA characteristic that affects the apparent color of the image. Yes, it does. Several lenses I own show this effect. The color shift on some is significant enough that it changes the effective color temp / white balance. Am I interpreting these results co...
by ChrisLilley
Thu Oct 06, 2011 1:26 pm
Forum: Equipment Discussions
Topic: Long CA effect on apparent color
Replies: 9
Views: 1544

SONYNUT wrote:TRY LESS LIGHT...
That isn't going to change the axial chromatic aberration of the lens in the slightest.
by ChrisLilley
Thu Oct 06, 2011 1:22 pm
Forum: Equipment Discussions
Topic: Small Aperture To Overcome Spherical Abberation
Replies: 2
Views: 841

So, the model 06A then? http://www.adaptall-2.org/lenses/06A.html (does not display in Firefox for some reason). In general, stopping down selects those light rays which have passed through more central (and thus, better corrected) portions of each lens element. However, stopping down to f/11 or f/1...
by ChrisLilley
Thu Oct 06, 2011 1:02 pm
Forum: Equipment Discussions
Topic: Windows 7 Magnifier Tool
Replies: 11
Views: 1774

I used this on occasion, but it always really messed up the locations of the icons on my desktop when I exited it. (And I've got a bunch of them!). So I stopped using it, too annoying. Do you find it "messes" with your desktop icon organization? Was this on Windows 7 or an earlier version? I'm usin...
by ChrisLilley
Thu Oct 06, 2011 1:00 pm
Forum: Equipment Discussions
Topic: Windows 7 Magnifier Tool
Replies: 11
Views: 1774

does the whole page...better if it was just a square... By default it gives you the whole screen, yes. Click on the icon and you have options for magnification (default 200%) and view - full screen (default), rectangle which follows the mouse, and a docked rectangle. -- typed on my Windows7 machine
by ChrisLilley
Thu Oct 06, 2011 12:56 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Sensor dust - something to be worried about?
Replies: 13
Views: 1967

Hi First, welcome to the forum. Second, be gentle for the non-experts, what is a tachinid exactly? Thirdly, sensor dust. A few spots are to be expected on any SLR as the inevitable result of changing lenses. They are in general nothing to worry about. SLRs which feature sensor cleaning can clean the...