Originally posted by GoremanX Canon discontinued the APS-H line to consolidate 2 camera lines into one and save money. Most 1D owners are still 1D owners. They have not "upgraded" to the 1D X. Everyone who's ever owned a camera with an APS-H sensor loves the format.
Are you saying that no one that owned a Canon APS-H DSLR have upgraded to FF?
Quote: A smaller sensor will always be faster than a larger one of the same generation using the same technology. It's just physics.
In theory, yes. But as APS-H sensors are not being manufactured anymore, and it might not be possible to get APS-H sensors with same sensor tech as best FF sensors. Pentax can only sell a limited number of FF/APS-H cameras so they probably have to use one of the less known sensor manufacturers for a custom design sensors. Which usually means that the sensor tech is inferior to the latest sensor tech.
Pentax cameras are rarely speed monsters, so using APS-H would not be because of FF being too slow.
Quote: A larger sensor will always have better image quality than a smaller one of equivalent resolution in the same generation. Again, simple physics.
Yep, that is why most want the largest possible sensor that the system allow (aka Full Frame in most DSLR systems) when upgrading from APS-C.
Quote: An APS-H sensor would have better IQ, low light performance, make better use of FF lenses, and give shallower depth of field than an APS-C sensor.
Yes, but FF will have same advantage over APS-H.
Quote: An APS-H sensor would be faster, lighter, provide more reach and result in a smaller camera than a FF sensor.
Yes, but APS-C will have even bigger advantage in this than APS-H. The Q might be the ultimate system in this regard.
Quote: There's no downside here. None whatsoever. Just benefit. Add to that my second prediction of using sensor-shift to produce 4x the resolution in controlled environments, and you've got a simple-to-produce blockbuster camera with specs that most professional photographers would drool over.
There are many downsides on using APS-H.
- Supply of APS-H sensors is difficult to find so old inferior sensor tech might have to be used.
- Market expect FF when it come to high end ILC, so it might be very difficult to find customers that pay premium price for APS-H.
- Difficult to market a system that is technically inferior to competition.
- Few existing lenses optimized for APS-H sensor. New lenses optimized for APS-H will be needed. FI a 20-60mm normal zoom.
- Users want best possible support for their old FF lenses (FF camera).