08-07-2010, 04:22 PM
[quote name='Brightcolours' timestamp='1281185211' post='1566']
APS-C lenses just have to have a less wide image circle, making them potentially lighter, and cheaper to make.
Full frame lenses can be used on both ASP-C and full frame lenses.
Canon calls their APS-C lenses EF-S, full frame lenses are called EF (electro-focus). The S stands for Short, the distance between sensor and lens can be a bit shorter for their APS-C lenses.
Lens brands and their APS-C naming conventions:
Brand : full frame / APS-C
Canon : EF / EF-S
Tamron : Di / Di II
Sigma : DG / DC
Tokina : - / DX
Nikon : - / DX
Sony : - / DT
Pentax : A big mess.
[/quote]
Pentax a big mess? DA is for digital, FA for 135 film (which of course would cover a 36x24mm sensor), and they do have a couple of D FA lenses. I don't see the mess.
Some DA lenses do cover the 36x24mm area as well, but the lenses are still intended for APS-C sized sensors.
APS-C lenses just have to have a less wide image circle, making them potentially lighter, and cheaper to make.
Full frame lenses can be used on both ASP-C and full frame lenses.
Canon calls their APS-C lenses EF-S, full frame lenses are called EF (electro-focus). The S stands for Short, the distance between sensor and lens can be a bit shorter for their APS-C lenses.
Lens brands and their APS-C naming conventions:
Brand : full frame / APS-C
Canon : EF / EF-S
Tamron : Di / Di II
Sigma : DG / DC
Tokina : - / DX
Nikon : - / DX
Sony : - / DT
Pentax : A big mess.
[/quote]
Pentax a big mess? DA is for digital, FA for 135 film (which of course would cover a 36x24mm sensor), and they do have a couple of D FA lenses. I don't see the mess.
Some DA lenses do cover the 36x24mm area as well, but the lenses are still intended for APS-C sized sensors.