Bug Wings On 55 Year Old Slides

Mitch640 · Post by **Mitch640** » Mon Jan 23, 2012 3:33 am

Pau, I just tried your suggestions. I have been able to get DF with the 10x by using the 0 mark, or BF. I just tried it with the PH3 and that worked also. But I have never gotten a DF or a good oblique effect with the 20x Plan APO or any of my other lenses.

The 0 stop is a BF stop with an iris in it, and I have not tried adjusting that yet. I'll do that later today. It is far too small for me to build a Rheinburg filter for it though, about big enough to stick the tip of your first finger in it. Maybe there is a size of those ready made plastic ones that will fit.

Charles Krebs · Post by **Charles Krebs** » Thu Jan 26, 2012 11:28 pm

Really nice Mitch. I especially like the pattern butterfly wing scales (#4).

The NA of your 20X Plan Apo is a probably a little too high to get darkfield via a "stop".... you would really need a dedicated darkfield condenser (with the proper specifications) for that one. But you should be able to get very nice oblique with the method Pau described.

Mitch640 · Post by **Mitch640** » Fri Jan 27, 2012 4:28 am

Thanks Charles. I can get a pretty decent Oblique from the 20x Plan Apo using the zero stop on the condenser. I have never been a fan of darkfield for some reason though. I guess it's like Phase Contrast, it only looks good on the right subject.

Pau · Post by **Pau** » Fri Jan 27, 2012 5:51 am

Mitch640 wrote: .... I guess it's like Phase Contrast, it only looks good on the right subject.

This apply to all techniques BTW

Mitch640 · Post by **Mitch640** » Fri Jan 27, 2012 6:01 am

Pau wrote:
Mitch640 wrote: .... I guess it's like Phase Contrast, it only looks good on the right subject.
This apply to all techniques BTW

I was beginning to notice that.