Lens sharpness.

Mongoose
Posted 27/10/2009 - 15:26 Link
my feeling is that Oggys shot looks like subject movement. I could be wrong, but TBH I'd be disapointed with that level of sharpness from my FA 80-320 so I reckon it must be something other than the lens.
you don't have to be mad to post here



but it does help
MattMatic
Posted 27/10/2009 - 15:45 - Helpful Comment Link
Have you checked accuracy of focus for both lenses?
Maybe a static focus-check (and adjustment) might help.

However, that's just a thought... I can't find much evidence of OOF in the 300mm shot, perhaps a combination of slight motion blur + slight OOF.

I'd also need to go off and check DoF at 300mm, f/4 vs 100mm, f/2.8 ....

Matt
http://www.mattmatic.co.uk
(For gallery, tips and links)
Anvh
Posted 27/10/2009 - 18:21 Link
The photos of Hyram have the same "softness" as that from Oggy.

I believe the close focusing is to blame since with subjects further away it's far sharper.
Stefan
Comment Image

K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
fatspider
Posted 27/10/2009 - 18:42 - Helpful Comment Link
I agree with the contrast theory the macr obviously produces higher contrast images and this is adding to the illusion of clarity because it also tends to show more detail. this is cleary evident if you compare the detail of the nearest facin petal on each shot.
My Names Alan, and I'm a lensaholic.
My PPG link
My Flckr link
Oggy
Posted 27/10/2009 - 19:38 Link
Thanks for all the replies.

Me pigeon reckons the 300 can turn in a decent picture -

[IMG]http://i217.photobucket.com/albums/cc222/Oggy3323/Pigeon.jpg[/IMG]

As to the subject moving, it's in a vase on our mantelpiece and anything stronger than a tiny draught gives Mrs Oggy hypothermia. Prime suspect has to be the tripod.

(Wonders off with some pieces of wood and bags of lead shot:lol
Oggy
Posted 27/10/2009 - 20:35 Link
Ok - next attempt.

I have put the flowers on the floor, collapsed the tripod to it's minimum height and hung my diving belt (16lbs of high hysteresis lead shot) over the barrel of the lens carefully.

F4

[IMG]http://i217.photobucket.com/albums/cc222/Oggy3323/Flower300-4.jpg[/IMG]

F8

[IMG]http://i217.photobucket.com/albums/cc222/Oggy3323/Flower300-8.jpg[/IMG]
fatspider
Posted 27/10/2009 - 21:28 Link
So the contrast theory reigns supreme

Load both images side by side into photoshop and lower the contrast on the macro, you can get the two almost identical.

Apart from the DoF theres nothing in it.
My Names Alan, and I'm a lensaholic.
My PPG link
My Flckr link
Oggy
Posted 27/10/2009 - 21:35 Link
While I'm sure contrast plays a part in perceived sharpness, I'm not sure how stabilising the camera increases it.
Comment Image
Anvh
Posted 27/10/2009 - 21:47 Link
They do look a lot better Oggy.
Stefan
Comment Image

K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
stu49
Posted 27/10/2009 - 22:49 Link
Still prefer the macro one !

Stu - K10D | DFA 100/2.8 Macro | DA 55-300 | AF-360FGZ |

So much to learn... So little time !
Oggy
Posted 27/10/2009 - 22:56 Link
Me too Stu. It seems more at home at short range than the 300. Great little lens.

(Notice how I avoided describing it as 'cracking' which has always struck me as an unfortunate turn of phrase :roll
womble
Posted 28/10/2009 - 10:13 Link
Oggy wrote:
...(Notice how I avoided describing it as 'cracking' which has always struck me as an unfortunate turn of phrase :roll
Especially with 16lbs of lead hanging off it.

K.
Kris Lockyear
It is an illusion that photos are made with the camera… they are made with the eye, heart and head. Henri Cartier-Bresson
Lots of film bodies, a couple of digital ones, too many lenses (mainly older glass) and a Horseman LE 5x4.
Oggy
Posted 28/10/2009 - 22:53 Link
womble wrote:
Oggy wrote:
...(Notice how I avoided describing it as 'cracking' which has always struck me as an unfortunate turn of phrase :roll
Especially with 16lbs of lead hanging off it.

K.
Not quite as brutal as it might sound Kris

[IMG]http://i217.photobucket.com/albums/cc222/Oggy3323/Weight.jpg[/IMG]

(Oh there is the remote control:lol
johnriley
Posted 28/10/2009 - 23:46 Link
Oggy, I wonder at the widsom of putting that amount of force on the lens mount....it's usual to weigh down the tripod, not the lens.
Best regards, John
stu49
Posted 29/10/2009 - 11:44 Link
johnriley wrote:
Oggy, I wonder at the widsom of putting that amount of force on the lens mount....it's usual to weigh down the tripod, not the lens.
Cracking Grommit !!

Stu - K10D | DFA 100/2.8 Macro | DA 55-300 | AF-360FGZ |

So much to learn... So little time !

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