"This lens is soft" and other myths


bretbysteve

Link Posted 13/03/2009 - 12:15
Hi,

Very useful explanation on "my lens is soft" "my lens front/back focuses"....particularly relevant to K20D owners...

http://www.lensrentals.com/news/2008.12.22/this-lens-is-soft-and-other-myths

cheers Steve.

johnriley

Link Posted 13/03/2009 - 12:36
Thanks Steve. Very interesting and well worth reading.
Best regards, John

shim

Link Posted 13/03/2009 - 13:54
I saw that site about a month ago and bookmarked this page about Sigma



shim

scottthehat

Link Posted 13/03/2009 - 14:32
cheers guys, they were both interesting reads,

womble

Link Posted 13/03/2009 - 14:55
Very useful article. Nice to see the K20 up there with the top-end Nikons etc

Perhaps this post should be made a sticky in the lens section because it is an old chestnut we have seen discussed on here plenty of times.
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.

My website

RR

Link Posted 13/03/2009 - 15:12
The first thing I do when recieving a new lens is whip out the focus chart & adjust the focus accordingly. All my Pentax lenses have required a tweak due to front focus, which may suggest my body is a little off !
My Flickr

chirpy

Gwyn

Link Posted 13/03/2009 - 18:44
Interesting articles and good to read.

Also interesting to see that they don't actually carry Pentax fit lenses.

RaV

Link Posted 13/03/2009 - 18:53
Cheers for the link!

Does this just apply to AF lenses?
~Conal

Pentax K20D | 18-55mm II | 50-200mm | SMC A 50mm f2 |
DeviantArt | My Flickr |

Anvh

Link Posted 13/03/2009 - 19:21
RaV wrote:
Cheers for the link!

Does this just apply to AF lenses?

yes in a way, if your focus is off you get the same effect of course.
Since manual focus realise on you and what you see through the viewfinder there is always a chance to get a fault somewhere, nothing in this world is 100% perfect afterall certainly not humans.
Stefan


K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ

Daniel Bridge

Link Posted 13/03/2009 - 20:00
Anvh wrote:
nothing in this world is 100% perfect afterall certainly not humans.

Speak for yourself!

Dan
K-3, a macro lens and a DA*300mm...

Anvh

Link Posted 13/03/2009 - 20:24
Daniel Bridge wrote:
Anvh wrote:
nothing in this world is 100% perfect afterall certainly not humans.

Speak for yourself!

Dan

if you're 100% perfect you aren't 100% human since humans make mistakes so if you're 100% human you can't be 100% perfect you see.
Stefan


K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ

Daniel Bridge

Link Posted 14/03/2009 - 20:22
Anvh wrote:
...if you're 100% human you can't be 100% perfect you see.

Ahh, I see you're mistaken.

Dan
K-3, a macro lens and a DA*300mm...

Anvh

Link Posted 14/03/2009 - 20:52
yes of course I'm human afterall or atleast I think I'm, don't know if that's a mistake or not... okay I'm lost now

Josh Billings wrote:
If a man should happen to reach perfection in this world, he would have to die immediately to enjoy himself.


Stefan


K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ

aminstar

Link Posted 14/03/2009 - 20:58
Anvh wrote:
yes of course I'm human afterall or atleast I think I'm, don't know if that's a mistake or not... okay I'm lost now

Josh Billings wrote:
If a man should happen to reach perfection in this world, he would have to die immediately to enjoy himself.


Ahh, I know now why so many people I know ended up dead, , that's because they had reached perfection and wanted to enjoy themselves ha

Stefan, DA*300 is a great lens, but weather hasn't been good around here so not many chances to put it to test thoroughly, but from what I have seen it so far its absolutely fascinating .
Now I am in the market for a new bag , one that holds the K20 with the 300 attached to it. My poor Kata 3N1-20 is not good enough for that

Thanks about the photoshop, will await your mail when you are free.

Amin
Amin Photo Gallery
Last Edited by aminstar on 14/03/2009 - 20:59
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