icerya purchasi, or Cotton Cushion Scale
Jan 19, 2013 17:38:24 #
About 2-3 mm long.
F/22 @ 1/160 with Strobe @ M 1/4 power
105G @ 1:1 with 68mm extension 1.9:1 my estimate, but this was cropped
F/22 @ 1/160 with Strobe @ M 1/4 power
105G @ 1:1 with 68mm extension 1.9:1 my estimate, but this was cropped
Jan 19, 2013 18:35:42 #
Are you noticing a loss in DOF with the 68mm added to your lens?
Jan 19, 2013 18:45:25 #
Yes. I did not expect to struggle with this as much as I have. There are times when I think my eyesight is just not adequate. I would imagine your experimentation into lens stacking is even more challenging. At least I get some automated functions.
Jan 19, 2013 23:02:13 #
LoneRangeFinder wrote:
You would not think it would be as difficult as it is you have a DOF loss plus a natural loss of light when using tubes so it makes a big difference actually all you with those fancy automatic lens should have less problems with stacking all you would lose is DOF and working distance.I would imagine your experimentation into lens stacking is even more challenging. At least I get some automated functions.
Jan 20, 2013 07:25:11 #
hangman45 wrote:
I'm using full manual to focus with the tubes and the reverse lens stack. When I use a Full set of tubes the Auto focusing is slower like I don't get 100% connection, a loss of power. When I hear my lens and camera struggle to focus it sends shivers down my spine, after all this is my baby. And with my latest set up the macro 60mm reversed onto the 100mm it's just to much weight to expect my camera to focus back and fourth. It actually just as easy to manual focus for me as I just run that lens out to max. focus and leave it. I am experiencing light loss with the stacked lens Only because my lens are shadowing the subject, well more like Blocking the light. The need to bring the flash forward is the only solution I see.You would not think it would be as difficult as it is you have a DOF loss plus a natural loss of light when using tubes so it makes a big difference actually all you with those fancy automatic lens should have less problems with stacking all you would lose is DOF and working distance.
Jan 20, 2013 07:34:33 #
LoneRangeFinder wrote:
I've been having a little problem as the subjects are so small and I don't get as much light thru the reverse lens setup. I'm going to adjust my view finder up one notch and see if that helps. I wear glasses and it's time for me to up the scripted. I really need to increase my view finder for the water drop shotsI did not expect to struggle with this as much as I have. There are times when I think my eyesight is just not adequate. I would imagine your experimentation into lens stacking is even more challenging. At least I get some automated functions.
Jan 20, 2013 08:42:31 #
fstop22 wrote:
Martin: are you referring to a diopter adjustment or level of illumination adjustment of the viewfinder?I've been having a little problem as the subjects are so small and I don't get as much light thru the reverse lens setup. I'm going to adjust my view finder up one notch and see if that helps. I wear glasses and it's time for me to up the scripted. I really need to increase my view finder for the water drop shots.
Are you using live view or the viewfinder to focus? I would think that live view would take too long with moving critters.
Jan 20, 2013 09:27:53 #
fstop22 wrote:
The light issue is why I have not done a lot of stacking of lens I made up a reverse mount for my lens before I ever got a macro lens but working distance made it difficult to light after I made the new softbox I found that reversing my 55mm works out just right.I'm using full manual to focus with the tubes and ... (show quote)
Jan 20, 2013 09:55:37 #
hangman45 wrote:
What's the highest magnification on the 55 reversed?The light issue is why I have not done a lot of stacking of lens I made up a reverse mount for my lens before I ever got a macro lens but working distance made it difficult to light after I made the new softbox I found that reversing my 55mm works out just right.
Jan 20, 2013 10:25:24 #
LoneRangeFinder wrote:
Max is 2.87:1What's the highest magnification on the 55 reversed?
Jan 20, 2013 13:01:29 #
hangman45 wrote:
Ah... ok. Maybe I need to dig up the nifty 50 & find a coupling attachment.Max is 2.87:1
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