SIGMA 10/20 ON PENTAX
Posted 28/04/2008 - 17:04
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I'm never quite sure what people mean by untouched.
If it's JPEG in camera it's hard sharpening.
If it's RAW in camera then something has made it a JPEG so it would be helpful to know if it's Silky with it's immediate sharpening or Photoshop which probably doesn't sharpen.
I'm not sure it matters anyway. Surely you should test to see if your usual routine produces sharp images.
What I will say is that I wasbothered by the infinity focus until I learnt how to get a relaible focus with this lens which I now find to be really quite sharp.
For the little it's worth I'd expect the above to look sharper but that's beacuse I'd use Silky by default and then probably mess with the settings a bit!
Mike
If it's JPEG in camera it's hard sharpening.
If it's RAW in camera then something has made it a JPEG so it would be helpful to know if it's Silky with it's immediate sharpening or Photoshop which probably doesn't sharpen.
I'm not sure it matters anyway. Surely you should test to see if your usual routine produces sharp images.
What I will say is that I wasbothered by the infinity focus until I learnt how to get a relaible focus with this lens which I now find to be really quite sharp.
For the little it's worth I'd expect the above to look sharper but that's beacuse I'd use Silky by default and then probably mess with the settings a bit!
Mike
Posted 28/04/2008 - 17:30
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~Pete
Posted 28/04/2008 - 18:04
Link
Quote:
I'm never quite sure what people mean by untouched.
If it's JPEG in camera it's hard sharpening.
If it's RAW in camera then something has made it a JPEG so it would be helpful to know if it's Silky with it's immediate sharpening or Photoshop which probably doesn't sharpen.
I'm not sure it matters anyway. Surely you should test to see if your usual routine produces sharp images.
What I will say is that I wasbothered by the infinity focus until I learnt how to get a relaible focus with this lens which I now find to be really quite sharp.
For the little it's worth I'd expect the above to look sharper but that's beacuse I'd use Silky by default and then probably mess with the settings a bit!
Mike
Hi Mike what I meen by untouched was nothing done to the pic in photoshop or any other programe just as is.
I'm never quite sure what people mean by untouched.
If it's JPEG in camera it's hard sharpening.
If it's RAW in camera then something has made it a JPEG so it would be helpful to know if it's Silky with it's immediate sharpening or Photoshop which probably doesn't sharpen.
I'm not sure it matters anyway. Surely you should test to see if your usual routine produces sharp images.
What I will say is that I wasbothered by the infinity focus until I learnt how to get a relaible focus with this lens which I now find to be really quite sharp.
For the little it's worth I'd expect the above to look sharper but that's beacuse I'd use Silky by default and then probably mess with the settings a bit!
Mike
Posted 28/04/2008 - 18:06
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Posted 28/04/2008 - 19:59
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Here are some samples but they aren't untouched as they are JPEG
Mike
Mike
Posted 28/04/2008 - 21:16
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Thanks Mike Im not sure if this lens is as sharp as it should be I need to get out with it more and shoot a few more frames.
Posted 28/04/2008 - 22:03
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I felt exactly the same way when I got mine. I was concerned that it wasn't as sharp I was expecting. I think it was down to two issues:
Firstly I think it needs to be given some help focussing. I think you need to ensure it does have some contrasty objects in the focus zone. I now use spot focus all the time and use the arrow thingy on the back to shift where the red focus point is.
Also I'm getting (well am) older and my shots suffer from camera shake which is a bummer. This is a big lens and although it is short focal length physically it's long and heavy and I beleive that doesn't help.
To reassure myself I put the camera on a tripod and shot a brick wall and this showed me that I had to be careful about where the focus spot lay and also that the lens was quite sharp enough.
I had assumed that such a short focal length would have immense depth of focus and hence be quite forgiving but that doesn't seem to be quite the case.
That said one of our co forum users had problems and got a replacement lens which he has found to be much sharper. Maybe I was lucky or I'm not demanding enough!
Mike
Firstly I think it needs to be given some help focussing. I think you need to ensure it does have some contrasty objects in the focus zone. I now use spot focus all the time and use the arrow thingy on the back to shift where the red focus point is.
Also I'm getting (well am) older and my shots suffer from camera shake which is a bummer. This is a big lens and although it is short focal length physically it's long and heavy and I beleive that doesn't help.
To reassure myself I put the camera on a tripod and shot a brick wall and this showed me that I had to be careful about where the focus spot lay and also that the lens was quite sharp enough.
I had assumed that such a short focal length would have immense depth of focus and hence be quite forgiving but that doesn't seem to be quite the case.
That said one of our co forum users had problems and got a replacement lens which he has found to be much sharper. Maybe I was lucky or I'm not demanding enough!
Mike
Posted 28/04/2008 - 22:32
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Just to clarify: Depth of Field is the area with an acceptable degree of sharpness in an image.
Depth of focus is the amount of leeway we have in the positioning of the film plane or sensor position.
Depth of focus is the amount of leeway we have in the positioning of the film plane or sensor position.
Best regards, John
Posted 29/04/2008 - 01:27
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I always use mine with manual focus on my K110D super as the auto focus seems to be confused. For most shots setting the focus just before infinity gives great results, unless you are shooting something really close. I try to use F8 to F11.
K100D Super, 18-55, 50-200, Sigma 10-20, Sigma 70mm macro and lots of old lenses
Posted 29/04/2008 - 06:54
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That's not been my experience and I never use manual focus. I just make sure the red spot area is on something with a hard edge and by and large I'm OK on focus now to the extent I don't worry at all.
And I guess I was expecting a more forgiving depth of field!
Mike
And I guess I was expecting a more forgiving depth of field!
Mike
Posted 29/04/2008 - 08:50
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Thanks guy's most kind of you all to take the time to help me. It's seems it might be a nice day today so Im going out again to try the lens I will use all the methods for focusing you have talked off and see what happens will also post the results for comment if I may ask your opinion once more.
Posted 29/04/2008 - 16:05
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My most used lens, you should have no regrets. Like MX veteran I try to keep it around f8 - f11. Never had any problems with focusing. I use AF as long as there is enough light, but select the focusing point (on K10D).
All of the following are 'touched' - processed in Lightroom and Photoshop CS3. The last image is HDR, processed in Photomatix then PS CS3
Neil
All of the following are 'touched' - processed in Lightroom and Photoshop CS3. The last image is HDR, processed in Photomatix then PS CS3
Neil
Posted 29/04/2008 - 17:03
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^^^ "Wow factors" don't get much bigger than that
Posted 29/04/2008 - 17:34
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Quote:
^^^ "Wow factors" don't get much bigger than that
I can only second that. For the rest I remain humble.........very humble^^^ "Wow factors" don't get much bigger than that
Martin.
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This is untouched taken with my k100 D.