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Gérard-64 · Post by **Gérard-64** » Sun Jan 22, 2012 5:57 am

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canonian · Post by **canonian** » Sun Jan 22, 2012 6:28 am

Wow, I love the dramatic lighting and the angle, it is very nice.
What optics did you use on this one and how was it processed?

Gérard-64 · Post by **Gérard-64** » Sun Jan 22, 2012 6:51 am

Thanks,it is a stack with Zerene(Pmax) using Canon MP-e 65mm @ 4X-80 pics.

Saul · Post by **Saul** » Sun Jan 22, 2012 12:57 pm

No words !!! Everything is excellent !!!

ChrisRaper · Post by **ChrisRaper** » Mon Jan 23, 2012 1:29 pm

Lovely image - what are you using to move the stack?

Saul · Post by **Saul** » Mon Jan 23, 2012 1:52 pm

...and how many frames ? What light was used ?

Thanks,

Saul

snic320 · Post by **snic320** » Mon Jan 23, 2012 2:34 pm

Nice contrast with the background and sharp details, a lil bit creepy too!
lol

naturephoto1 · Post by **naturephoto1** » Mon Jan 23, 2012 2:57 pm

Very nicely done. But, are we seeing some sort of a moiré pattern or something similar in the eye?

Rich

TheLostVertex · Post by **TheLostVertex** » Mon Jan 23, 2012 4:42 pm

Awesome shot. I really like the angle and lighting on it

rjlittlefield · Post by **rjlittlefield** » Mon Jan 23, 2012 5:10 pm

naturephoto1 wrote:But, are we seeing some sort of a moiré pattern or something similar in the eye?

The low contrast wavy bands are probably Moiré. But the high contrast straight lines and circular/elliptical arcs are due to the regular and roughly hexagonal pattern of ommatidia being seen from various angles.

Gérard, can you post an actual-pixels crop of that upper right eye?

--Rik

Gérard-64 · Post by **Gérard-64** » Tue Jan 24, 2012 12:41 am

Hi Rik,here it is:

@ 66%.

PS: Actually I have found that the moiré appears only when I add a little sharpening after having resized the image to the forum dimensions...

rjlittlefield · Post by **rjlittlefield** » Tue Jan 24, 2012 1:28 am

Thanks, Gérard!

--Rik

madmacro · Post by **madmacro** » Tue Jan 24, 2012 6:07 am

I like the dramatic lighting and sharpness.

naturephoto1 · Post by **naturephoto1** » Tue Jan 24, 2012 6:21 am

Gérard-64 wrote:Hi Rik,here it is:

@ 66%.

PS: Actually I have found that the moiré appears only when I add a little sharpening after having resized the image to the forum dimensions...

Hi Gérard,

Nice to know that there is no problem in the original but only in the resized image after sharpening. I am no expert in using Photoshop by any means, but I always try to sharpen the image before resizing. Maybe that is not the best way to go however.

Rich

rjlittlefield · Post by **rjlittlefield** » Tue Jan 24, 2012 10:36 am

naturephoto1 wrote:I always try to sharpen the image before resizing. Maybe that is not the best way to go however.

There are tradeoffs. I do most of my sharpening before resizing, but then when resizing I have to choose between just two options: Bicubic and Bicubic Sharper. Often Bicubic is not sharp enough but Bicubic Sharper is too much. So I usually opt for Bicubic and then do a little USM, typically around 35% at 0.7 pixels. If strong sharpening is required, typical for high mag images that were softened by diffraction, then that's definitely best done before resizing.

Bear in mind that some degree of Moiré is pretty much inevitable whenever you have a small regular pattern that gradually shifts phase with respect to the pixels. At the very least there will be a periodic shift of pixel values as the pattern lines up in different ways with respect to the pixels. See HERE for illustration. Depending on where and what direction you measure, the bold pattern of ommatidia in this eye has a spacing around 3-6 pixels per cycle after resizing. The lower end of this range puts it well into the danger zone. If Gérard wants, I can post an extreme crop of his resized fly eye to show what I'm talking about.

--Rik

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Excellent pic