• 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Forums > Back > new article: Equivalent Focal-Length, Aperture and Speed of Camera Systems
#11
Hi Klaus,

 

Thanks for putting this together!

 

However, there were a few things that I believe should be mentioned.

1) selected lenses for FF and µFT are for mirrorless while Pentax lenses for APS-C are for DSLR (leave out K-01 which takes DSLR lenses w/o adapter). For telelenses you can argue that this is in favour of DSLR because of the shorter construction of the lens only.

2) as you rightly said, the Pentax DA* 60-250/F4 doesn't really fit but if you replace the Sony FE with Canon/Nikon/Sigma 80/100-400 F4.5-5.6 which is more the range of the Pentax, you quickly end up in the 1340-1750 g range which is more than the Pentax lens even when correcting for slightly faster lens at lower focal lengths.

3) when selecting a more traditional focal length for telezoom (70/80-200) the situation between FF and APS-C also looks different:

Pentax DA* 50-135 F2.8 - 685 g; 136 mm long vs Canon 760 g; 172 mm long

 

Besides the very informative text, your lens selection goes more in a mirrorless vs dSLR rather than a sensor size comparison.

  Reply


Messages In This Thread
new article: Equivalent Focal-Length, Aperture and Speed of Camera Systems - by Schlimperdibix - 08-23-2016, 08:15 AM

Forum Jump:


Users browsing this thread: 13 Guest(s)