Neal Hodges
"O" its a double lens reverse test
I just got my 52 mm to 58 mm reversing ring (Good old Ebay) and WOW!!!!
This is my first real trial with it, and it is not bad for hand held. Seriously, I could not be bothered digging the tripod out of the garage, but I will do for the next time.
I have a canon 75-300 f4-5.6 at 300 mm f11 attached to the camera. Using the male-to-male reversing ring, I have attached the canon 50 mm f1.8, front element to front element. Focusing distance from the back of the 50 mm lens was probably less than 10 mm.
Lighting was from a SAD lamp touching the end of the lens.
The object you are looking at is a two pound coin (UK), specifically the “o” of pound. I measured it using an un-calibrated vernier calliper and my poor eyesight to be 1.4 mm across. Doing some rough measurments and calculations puts this at 1:7+ish. I will do some more tests to figure it out a bit better than that later on.
I have done a little contrast and exposure modification, and a slight sharpening, but there is no crop.
The “o” and the dots are actually raised, but I see them as indented. Does anyone else see this optical illusion?
Right, what else can I look at through this?
"O" its a double lens reverse test
I just got my 52 mm to 58 mm reversing ring (Good old Ebay) and WOW!!!!
This is my first real trial with it, and it is not bad for hand held. Seriously, I could not be bothered digging the tripod out of the garage, but I will do for the next time.
I have a canon 75-300 f4-5.6 at 300 mm f11 attached to the camera. Using the male-to-male reversing ring, I have attached the canon 50 mm f1.8, front element to front element. Focusing distance from the back of the 50 mm lens was probably less than 10 mm.
Lighting was from a SAD lamp touching the end of the lens.
The object you are looking at is a two pound coin (UK), specifically the “o” of pound. I measured it using an un-calibrated vernier calliper and my poor eyesight to be 1.4 mm across. Doing some rough measurments and calculations puts this at 1:7+ish. I will do some more tests to figure it out a bit better than that later on.
I have done a little contrast and exposure modification, and a slight sharpening, but there is no crop.
The “o” and the dots are actually raised, but I see them as indented. Does anyone else see this optical illusion?
Right, what else can I look at through this?