If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
Hasselblad (Carl Zeiss) lens v. Sony-Carl Zeiss lens on Sony a900
I took photos of the same subject (tail side of a Brit pound coin) at
the closest focus of the Hasselblad 120 f/4 Makro (mounted on a Sony a900). Images are at a slight angle to the subject, best focus is on the lower part of the coin. Hasselblad (Carl Zeiss) 120 f/4 Makro (f/8, 1/200, ISO 200) Full size: http://photo.net/photodb/photo?photo_id=9795863&size=lg 100% crop: http://photo.net/photodb/photo?photo_id=9795862&size=lg Then compared to the Sony Carl Zeiss 135 f/1.8 at the same distance (f/4.5, 1/200, ISO 200). Full image: http://photo.net/photodb/photo?photo_id=9795867&size=lg 100% crop: http://photo.net/photodb/photo?photo_id=9795864&size=lg The contrast seems higher with the Hassy lens, however the exposure is a little higher with the Sony lens, so hard to tell. (I shot each at about 2 stops closed from wide open and then adjusted the flash power, so may not match exp. perfectly). |
#2
|
|||
|
|||
Hasselblad (Carl Zeiss) lens v. Sony-Carl Zeiss lens on Sonya900
Alan Browne wrote:
I took photos of the same subject (tail side of a Brit pound coin) at the closest focus of the Hasselblad 120 f/4 Makro (mounted on a Sony a900). Images are at a slight angle to the subject, best focus is on the lower part of the coin. Hasselblad (Carl Zeiss) 120 f/4 Makro (f/8, 1/200, ISO 200) 100% crop: http://photo.net/photodb/photo?photo_id=9795862&size=lg Then compared to the Sony Carl Zeiss 135 f/1.8 at the same distance (f/4.5, 1/200, ISO 200). 100% crop: http://photo.net/photodb/photo?photo_id=9795864&size=lg The contrast seems higher with the Hassy lens, however the exposure is a little higher with the Sony lens, so hard to tell. (I shot each at about 2 stops closed from wide open and then adjusted the flash power, so may not match exp. perfectly). I turned down the exposure in lightroom to match and the contrast looks fine (brightness/contrast in irfanview does not do the same thing). It would be nice to see both at f/8. Anyways... zoomed in to 300% with a bunch of sharpening added in irfanview, the zeiss actually looks sharper. That's dome deep pixel peeping to even be able to make a call. The zeiss has a bit more ca but that could be the wider aperture and overexposure. I was looking in the lower left corner. -- Paul Furman www.edgehill.net www.baynatives.com all google groups messages filtered due to spam |
#3
|
|||
|
|||
Hasselblad (Carl Zeiss) lens v. Sony-Carl Zeiss lens on Sonya900
Paul Furman wrote:
Alan Browne wrote: I took photos of the same subject (tail side of a Brit pound coin) at the closest focus of the Hasselblad 120 f/4 Makro (mounted on a Sony a900). Images are at a slight angle to the subject, best focus is on the lower part of the coin. Hasselblad (Carl Zeiss) 120 f/4 Makro (f/8, 1/200, ISO 200) 100% crop: http://photo.net/photodb/photo?photo_id=9795862&size=lg Then compared to the Sony Carl Zeiss 135 f/1.8 at the same distance (f/4.5, 1/200, ISO 200). 100% crop: http://photo.net/photodb/photo?photo_id=9795864&size=lg The contrast seems higher with the Hassy lens, however the exposure is a little higher with the Sony lens, so hard to tell. (I shot each at about 2 stops closed from wide open and then adjusted the flash power, so may not match exp. perfectly). I turned down the exposure in lightroom to match and the contrast looks fine (brightness/contrast in irfanview does not do the same thing). It would be nice to see both at f/8. Anyways... zoomed in to 300% with a bunch of sharpening added in irfanview, the zeiss actually looks sharper. That's dome deep pixel peeping to even be able to make a call. The zeiss has a bit more ca but that could be the wider aperture and overexposure. I was looking in the lower left corner. They're both "Zeiss"! (Sony-Carl Zeiss (made by Sony) and (Hasselblad Carl Zeiss (made by CZ)). OTOH, I can do CA adjustment on raw conversion in CS3. I'll try to re-shoot tomorrow evening at constant exposure for both, though I suspect the Sony CZ is sharpest at f/4.5 - f/5.6. I'm not sure where the sweet spot for the Hassy is, could be around f/11 - got to go look for a curve, maybe at photodo (though that may be at infinity and the 120 Makro is not noted for sharpness except in the macro range). |
#4
|
|||
|
|||
Hasselblad (Carl Zeiss) lens v. Sony-Carl Zeiss lens on Sonya900
Alan Browne wrote:
I'll try to re-shoot tomorrow evening at constant exposure for both, though I suspect the Sony CZ is sharpest at f/4.5 - f/5.6. I'm not sure where the sweet spot for the Hassy is, could be around f/11 - got to go look for a curve, maybe at photodo (though that may be at infinity and the 120 Makro is not noted for sharpness except in the macro range). Hmm. The only curves for the 120 Makro I can find are at f/4 and f/8 (f/8 being a wee bit sharper), but no other curves. (for that matter, these are at infinity where the lens is known to be a bit soft). http://www.photodo.com/product_645_p4.html |
#5
|
|||
|
|||
Hasselblad (Carl Zeiss) lens v. Sony-Carl Zeiss lens on Sony a900
Alan Browne wrote:
I took photos of the same subject (tail side of a Brit pound coin) at the closest focus of the Hasselblad 120 f/4 Makro (mounted on a Sony a900). Images are at a slight angle to the subject, best focus is on the lower part of the coin. Hasselblad (Carl Zeiss) 120 f/4 Makro (f/8, 1/200, ISO 200) Full size: http://photo.net/photodb/photo?photo_id=9795863&size=lg 100% crop: http://photo.net/photodb/photo?photo_id=9795862&size=lg Then compared to the Sony Carl Zeiss 135 f/1.8 at the same distance (f/4.5, 1/200, ISO 200). Full image: http://photo.net/photodb/photo?photo_id=9795867&size=lg 100% crop: http://photo.net/photodb/photo?photo_id=9795864&size=lg The contrast seems higher with the Hassy lens, An objective measure would be to do some processing of the image to come up with the actual image's contrast. I don't know the math but I know it can be done. -- Ray Fischer |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Sony Carl Zeiss 135 f/1.7 - too sharp for the Maxxum 7D | Alan Browne | Digital SLR Cameras | 5 | July 17th 07 06:47 PM |
Sony Carl Zeiss 135 f/1.7 -- too sharp? | Alan Browne | 35mm Photo Equipment | 5 | July 16th 07 06:33 PM |
Sony Carl Zeiss 135mm f/1.7 -- too sharp for the Maxxum 7D | Alan Browne | Digital Photography | 6 | July 15th 07 07:46 PM |
Carl Zeiss for Sony Alpha/Minolta Maxxum 135mm f/1.8 | Alan Browne | 35mm Photo Equipment | 5 | July 8th 07 02:25 PM |
Carl Zeiss ZF /ZS Lens Range for Nikon and M42 | jeremy | 35mm Photo Equipment | 1 | November 16th 06 01:17 AM |