All Forum Comments
Comment by nass posted on Full frame or not ??? at 07/08/2015 - 09:25
But then this isn't just DSLRs this happens. For example I've had to explain things about web hosting to Fasthosts (they changed all their web hosting based on something I pointed out to them). That's not blowing my trumpet, it's just saying that when you're prepared to really delve deep into the detail of something then you often become more knowledgable than low level tier 3 support people, who are more often than not forced to learn and absorb vast quantity than deep quality. I bet that technician is expected to be a product specialist on dozens of cameras.... as if...
Comment by nass posted on K-3 II firmware bug? anyone else got it? at 27/07/2015 - 17:19
But, I do also tinker with other types of photography and already have the Pentax O-GPS unit, so having this built in is quite convenient for me. So out of the two, it's the -ii hands down for me.
Comment by nass posted on K-3 or K-3 II? at 27/07/2015 - 17:01
Comment by nass posted on Cognisys StopShot at 13/04/2015 - 17:39
How about just buying a decent clear filter and permanently gluing it in. That should give you the full thread the other side and bonus lens protection.
Comment by nass posted on Broken filter thread at 18/03/2015 - 11:00
Comment by nass posted on Broken filter thread at 18/03/2015 - 07:40
Comment by nass posted on older macro lens at 10/12/2014 - 06:32
Comment by nass posted on New Pentax User Redesign Screenshots at 06/11/2014 - 12:43
Comment by nass posted on Using sensor shift at 14/10/2014 - 15:25
Comment by nass posted on variable ND filters at 09/10/2014 - 10:40


Some say that a lens such as the one you cite will be better on a camera with an APS-C sensor since you only make use of the "best" bit, i.e. the middle. The bonus with using a telephoto zoom is that you get more for your money, focal length-wise. For example, a 300mm lens "becomes" 450mm.
Just to clarify on this, I found it quite confusing when I started so hopefully I can explain. APS-C, today's Pentax DSLRs, have a sensor area that is smaller that the sensor area of a full frame camera. In other words it records a smaller view that a full-frame would. This smaller view means a smaller angle of view. To throw in some imaginary figures:
a 300 lens on fullframe might record a 10 degree field of view
The same 300 lens on APSC might only record an 8 degree field of view
a 400 lens on fullframe might also record an 8 degree field of view
So what the marketers do is try and persuade us that the 300 on APSC is actually a 400, based on the field of view number. Personally I've always thought it a bit dubious, as a 300 is a 300 whatever camera you put on, but dubiousness has never stopped a marketer pushing a good line
Hope that vaguely helps,
-Johan