4 hours ago
|
Re: Help. Is this normal for the DA 18-135?
In reply to mr_blocher,
6 months ago
|
mr_blocher wrote:
I just acquired a used DA 18-135 and noticed right away that after zooming it is necessary to refocus. If so, this is not a true "zoom" lens, but a "vary-focal" lens. I have a Katz-eye split image focusing screen so the focus change is very obvious as I zoom.
Is this within design specs, or should I return it?
--
Jonathan Blocher
Instructor of Art, Design, and Humanities
mrblocher.com
Very few modern AF zooms today are true parfocal zooms, especially with more zoom range like the 18-135. With AF most users never notice this, so this is a non-issue for manufacturers. I would say this is normal.
| Post (hide subjects) | Posted by | When | |
|---|---|---|---|
| 6 months ago | |||
| 6 months ago | |||
| 6 months ago | |||
| 6 months ago | |||
| 6 months ago | |||
| 6 months ago |
   |
|
Connect with dpreview
|
