Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
02-17-2014, 03:42 PM   #61
Pentaxian




Join Date: Oct 2006
Location: Chicago suburb, IL, USA
Posts: 1,535
The math is not very difficult. From the pics (if this is indeed a pic of the lens we'll see), would have a front element of about 12.5mm by my measurement. If the lens falls in the middle of the FL range indicated on an older Q roadmap, then it should have a FOV EQ of @ 92mm for the Q, which works out to @ 17.5mm in actual FL. With this FL and entrance pupil size, this works out to @ f1.4 max aperture.

I think this would be an acceptable spec for most users, and if it's a 1:1, all the better. The only problem with looking at FOV EQs with macro lenses is that the actual FL is what counts for MFD/working distance at 1:1. Working distance will likely be pretty short, but the low weight and small size of the lens/body should allow for easier handling than a 1:1 DSLR setup. Don't forget that the Q with a 1:1 lens shows almost a 4:1 apparent magnification (size of subject in relation to the image frame), so this is a pretty extreme macro setup at MFD. Working distance could be improved by pulling back and shooting at a 1:1 apparent mag.

I think that it's a good idea to announce and show prototypes of this lens even if it will be a while before actual introduction. It gives current Q system owners something to look forward to and potential Q system buyers IMO, this lens and the 06 tele zoom should have been among the first available for the Q system (as well as the K to Q adapter) since they dramatically illustrate the size differential between the lenses (and therefore the total multi lens system size) of the Q system against any other ILC system.

Scott

02-18-2014, 06:33 AM   #62
Senior Member




Join Date: Aug 2012
Photos: Albums
Posts: 188
size of the entrance pupil is not the same as size of the front element (again look at the 01)


but yes ... technically its possible .. with a nightmarish image quality at the boarders.
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
camera, cp, cp+, macro, mirrorless, model, pentax q, pentax q10, pentax q7, q10, q7, tele macro, telephoto, telephoto macro
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
CP+ - Q Body Cap Lens Docrwm Pentax Q 28 02-03-2013 12:07 PM
Q Telephoto, DA 18-270, DFA 90mm Macro Leaked JPT Pentax News and Rumors 79 09-10-2012 01:53 PM
Prince Harry's Naked Ass to be shown in Sun Newspaper ihasa General Talk 5 08-24-2012 08:24 PM
Pentax 560mm F5.6 to be WR - CP+ Photos of front and back Adam Pentax News and Rumors 92 02-18-2012 06:45 AM
DA 50mm, DA 560mm, D-FA 645 90mm to be revealed at CP+ Adam Pentax SLR Lens Discussion 56 02-10-2012 08:56 AM



All times are GMT -7. The time now is 06:14 PM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top