Originally posted by adwb Newarts, thank you the 8.2" info is very interesting, so, at infinity with a prime I will have to crop and enlarge if the object is too small, conversely if the object is to large I will have to move the camera back?
You cannot move the camera back and maintain focus; 8.2" is the maximum distance from Raynox 150 to subject.
Quote: So if I live with the oft reported poor IQ of a zoom the camera will not need to be moved as the zoom can be utilised?
BTW what is the distance for the Raynox 250?
Alistair
Correct. The combination of a long zoom (like 50-200, 70-300, etc.) with a Raynox 150 is very convenient. The lens stays fixed in space 8.2" from the subject, while the magnification is changed by zooming.
The image quality may not be bad even with a mediocre zoom lens; you'll be using only the center part of the lens at small apertures, where the lens should be at its best.
The Raynox 250's focal length is 125mm, about 5". The 250's increased strength & decreased working distance makes it a little more difficult to use; for example the decreased working distance makes getting light to the subject more difficult - especially the on-board flash.
If you've a long zoom or selection of long lenses I recommend the 150.
Dave in Iowa
PS how about 100% crop = "displayed at capture resolution" or "one display pixel per sensor pixel"?