Back Focus Chart Patterns? Preferences?

[Eric Ulbrich]

So im considering buying a non-focusable diascope from uniqOptics. I am however hesitant to purchase mainly because of their back focus pattern (Siemens Star)

The Image here:
http://www.uniqoptics.net/on%20camera%20view2.jpg

I dont know. What do you guys think? If this was a piece of gear you were interested in purchasing would you have a different idea as to what you would want the focus pattern to be? Is one better than the other? What do you AC's and Lens Houses prefer to use?

[Matthew Duclos]

I've tried Uniq's diascope with that test pattern. I find it to be very useful.
The tips toward the center will really pop when you achieve proper back focus.

[chuck colburn]

I always found a siemens star very easy to use. Be it in an optical instrument or on a target.

[Evin Grant]

Putora is my fave.

[Curran Giddens]

Yeah, I'd go with the Putora.

Check out this thread for more information:

http://reduser.net/forum/showthread.php?t=30084