All Forum Comments
Comment by johnwhit posted on Focus issues. at 03/07/2010 - 17:37
It certainly puts to rest any notion that your Sigma is soft Ian
Regards,
John
Regards,
John
Comment by johnwhit posted on Church gates at 03/07/2010 - 11:31
Some 100% crops showing the best and worst of performance:
[IMG]http://i884.photobucket.com/albums/ac49/johnwhit24/Lens%20Tests/Centre.jpg[/IMG]
In the centre.....
[IMG]http://i884.photobucket.com/albums/ac49/johnwhit24/Lens%20Tests/Detail_left.jpg[/IMG]
Far left of centre.........
[IMG]http://i884.photobucket.com/albums/ac49/johnwhit24/Lens%20Tests/Worst.jpg[/IMG]
Purple fringing, top left corner......
[IMG]http://i884.photobucket.com/albums/ac49/johnwhit24/Lens%20Tests/Worst_2.jpg[/IMG]
Purple fringing, right, fire escape..........
Nothing a little PP wouldn't fix
Best regards,
John
[IMG]http://i884.photobucket.com/albums/ac49/johnwhit24/Lens%20Tests/Centre.jpg[/IMG]
In the centre.....
[IMG]http://i884.photobucket.com/albums/ac49/johnwhit24/Lens%20Tests/Detail_left.jpg[/IMG]
Far left of centre.........
[IMG]http://i884.photobucket.com/albums/ac49/johnwhit24/Lens%20Tests/Worst.jpg[/IMG]
Purple fringing, top left corner......
[IMG]http://i884.photobucket.com/albums/ac49/johnwhit24/Lens%20Tests/Worst_2.jpg[/IMG]
Purple fringing, right, fire escape..........
Nothing a little PP wouldn't fix
Best regards,
John
Comment by johnwhit posted on Samyang 8mm FE torture test at 03/07/2010 - 10:49
Yeah the MX gets my vote too, I still keep 2 of them, I actually prefer the size of the KX and the metering indication in the VF, it lacks interchangeable focusing scrrens but has MLU (mirror lock up). MLU can be achieved on the MX if you know the knack but it's not a feature.
Regards,
John
Regards,
John
Comment by johnwhit posted on Just joined seeking advice at 02/07/2010 - 13:39
Taken today at work, at f/3.5 it's a little soft with reduced contrast, nice and sharp by f/5.6. This is taken at f/8 ISO 400 very sharp edge to edge, some purple fringing in extreme contrast situations but generally excellent. The build quality is very good, outer barrel is reminiscent of a DA* prime, body contol aperture at 1/3 stops through the entire range in "A" setting. Focus ring turns in the correct direction and is nicely damped, I think it's a bargain:
[IMG]http://i884.photobucket.com/albums/ac49/johnwhit24/Lens%20Tests/F8.jpg[/IMG]
[IMG]http://i884.photobucket.com/albums/ac49/johnwhit24/Lens%20Tests/F8.jpg[/IMG]
Comment by johnwhit posted on Samyang 8mm FE torture test at 02/07/2010 - 12:39
JohnX wrote:
AFAIK the in-camera focus adjustment only applies to AF, and on the K10D requires modified firmware to be loaded?
Both the K20D and K7 have AF adjustment as part of their standard menu.
Try some AF shots of the same subject with your 300mm at differant apertures and post the results here, together with shots taken with MF.
If you can complete the above within a few minutes that will hopefully eliminate any light level variables.
Make sure you don't lose the EXIF data in the process of posting the photos.
Posting shots as suggested will give the experts here a better chance of diagnosing what the issue is.
Preferably using a tripod and cable release/remote release to eliminate camera shake.AFAIK the in-camera focus adjustment only applies to AF, and on the K10D requires modified firmware to be loaded?
Both the K20D and K7 have AF adjustment as part of their standard menu.
Try some AF shots of the same subject with your 300mm at differant apertures and post the results here, together with shots taken with MF.
If you can complete the above within a few minutes that will hopefully eliminate any light level variables.
Make sure you don't lose the EXIF data in the process of posting the photos.
Posting shots as suggested will give the experts here a better chance of diagnosing what the issue is.
Regards,
John
Comment by johnwhit posted on Focus issues. at 02/07/2010 - 11:08
The early one is a very good lens, probably better optically than the latest, but they're a completely different design. I's say the newer version is ergonomically much better, but I'm keeping the 24-70/2.8 EX DG, it gives more than acceptable results.
Regards,
John
Regards,
John
Comment by johnwhit posted on Sigma 24-70 at 01/07/2010 - 21:07
The Katseye will only help with manual focus it has no influence on AF performance AFAIK.
John
John
Comment by johnwhit posted on Focus issues. at 01/07/2010 - 20:59
Hi thoramay,
If it's what you wanted, well that's all that matters, I hope you enjoy the lens. Your 645 lens cap is in the post, sorry for the delay, things are a little busy here.
Regards,
John
If it's what you wanted, well that's all that matters, I hope you enjoy the lens. Your 645 lens cap is in the post, sorry for the delay, things are a little busy here.
Regards,
John
Comment by johnwhit posted on pentax 300mm F4.5. at 01/07/2010 - 20:56
Pentaxophile wrote:
One of the few plant families to produce fully mobile sperm! This is why these plants like damp places - the sperm needs a film of water to swim in. Sorry, getting a bit Gardener's Question Time...
One of the few plant families to produce fully mobile sperm! This is why these plants like damp places - the sperm needs a film of water to swim in. Sorry, getting a bit Gardener's Question Time...
John
Comment by johnwhit posted on Can someone ID this for me please? at 30/06/2010 - 19:29
So.................it's not the lens.........I doubt it's the camera..........dare I say technique
Regards,
John