I'm explaining this question the best that I can

So here it goes, well I a G11 in an Ikelite housing, I bought an Inon 165mm macro lens, the first time I used the lens I learned that you need to zoom out the lens so that the shot I take doesn't make that James Bond 007 kind of circle in my photos. So I zoomed it out all the way to the line that I see in my bar on the top part of the lcd when I zoom the lens, then I bought another Inon 165mm macro lens and stacked it on the first one that I bought. now my question is, do I have to zoom out the lens all the way to that line on G11's zoom "bar" (?) or just zoom it enough so as not to create that barrel look in my photos?

Can you show us some examples? Having to zoom out doesn't make sense to me, unless it is for focusing closer...

So here it goes, well I a G11 in an Ikelite housing, I bought an Inon 165mm macro lens, the first time I used the lens I learned that you need to zoom out the lens so that the shot I take doesn't make that James Bond 007 kind of circle in my photos. So I zoomed it out all the way to the line that I see in my bar on the top part of the lcd when I zoom the lens, then I bought another Inon 165mm macro lens and stacked it on the first one that I bought. now my question is, do I have to zoom out the lens all the way to that line on G11's zoom "bar" (?) or just zoom it enough so as not to create that barrel look in my photos?

In general if you are getting vignetting, you should need to zoom in (toward the telephoto direction rather than toward the wide direction) and you should zoom in just until you see no more vignetting.

Bill

Can you show us some examples? Having to zoom out doesn't make sense to me, unless it is for focusing closer...

May be the 007 effect is from vinetting. "Zooming out" to a less wide setting would eliminate the dark circle.

Bob

Yes - it's obviously vignetting and You need to ZOOM IN (that's the right termin here as Bill mentioned) just enough that the vignetting is gone and then You can but this setting under one of You'r custom settings (with an Tv and Av good to start out with) so You dont have to zoom in every time.

Cheers

Karel

If what you're after is maximum magnification then you would zoom all the way to the long end of the zoom range when using add on macro lenses.

(Zoom IN on the image or zoom the lens OUT??? Confusing terminology! Best to say zoom long or zoom wide)

The CUT OFF (not vignette) occurs when the lens is too wide for whatever is out front.

Now your question was ".....do I have to zoom out the lens all the way to that line on G11's zoom "bar" (?) or just zoom it enough so as not to create that barrel look in my photos?"

Answer....Whatever works. Try it and see.

thanks guys for the time, panda actually got what I meant with my question

Jason, if You get a sharp focus with x2 stacked macro lenses when the image is zoomed in to the maximum (or lens out ), the I would like to see it.

I have found it very hard to get a sharp focus with double macro lenses when I have zoomed just enough to get rid of the vignetting - more zooming and I was not able to get any results I was happy with.

Cheers

Karel