DA* 16-50 how to test quality

**sinus007** · 10-16-2009, 10:33 AM

Hi Alex,
I'm late to the discussion, but FWIW:
there were quite a few post in regards to testing 16-50 and the main focus was on de-centering. The test is fairly simple. attach a newspaper to a wall or floor, make sure it's as flat as possible; put your cam on a tripod and position it close to min focusing distance and make sure that sensor plane is parallel to the newspaper; insure constant lighting; make a few shots wide open and compare letters at the edges: right vs left, up vs down.
Good luck,

stormcloud · 10-23-2009, 10:54 AM

i really want this lens to replace my kit lens but with all the trouble people have with it just not sure if i can be bothered with the hassle involved in getting a good one

**Ash** · 10-23-2009, 01:35 PM

Originally posted by stormcloud

i really want this lens to replace my kit lens but with all the trouble people have with it just not sure if i can be bothered with the hassle involved in getting a good one

To be honest, I think there is a little too much hysteria raised by people seeking absolute perfection when they test the limits of their lenses with imperfect techniques. I'm sure there are a number of genuinely decentered or badly BF/FF copies out there, but I often wonder whether good copies are being sent back at times when the tests done by users fail to impress them for reasons that can be explained by flawed testing. That's the vain of my earlier post here.

One should be mindful to consider their lens as good until proven bad rather than the other way around.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
K-5 video quality	dileepkrp	Video Recording and Processing	16	10-10-2010 12:45 PM
Fuji Quality II	woof	Film SLRs and Compact Film Cameras	3	02-21-2009 12:54 AM
dc.watch 6 DSLRs image quality test	yakiniku	Pentax News and Rumors	9	11-12-2008 05:02 AM
Quality between 2 lenses...	mchud	Pentax SLR Lens Discussion	6	10-01-2008 09:30 AM
Interesting DR Test and BG Noise Test of the K20D	RiceHigh	Pentax DSLR Discussion	14	06-25-2008 09:49 AM

10-16-2009, 10:33 AM	#31
sinus007 Site Supporter Join Date: Jul 2008 Location: Cleveland, OH, USA Photos: Gallery Posts: 292	Hi Alex, I'm late to the discussion, but FWIW: there were quite a few post in regards to testing 16-50 and the main focus was on de-centering. The test is fairly simple. attach a newspaper to a wall or floor, make sure it's as flat as possible; put your cam on a tripod and position it close to min focusing distance and make sure that sensor plane is parallel to the newspaper; insure constant lighting; make a few shots wide open and compare letters at the edges: right vs left, up vs down. Good luck,

10-23-2009, 10:54 AM	#32
stormcloud Senior Member Join Date: Oct 2009 Posts: 232	i really want this lens to replace my kit lens but with all the trouble people have with it just not sure if i can be bothered with the hassle involved in getting a good one

10-23-2009, 01:35 PM	#33
Ash Loyal Site Supporter Join Date: Mar 2007 Location: Toowoomba, Queensland Photos: Gallery \| Albums Posts: 23,920	Originally posted by stormcloud i really want this lens to replace my kit lens but with all the trouble people have with it just not sure if i can be bothered with the hassle involved in getting a good one To be honest, I think there is a little too much hysteria raised by people seeking absolute perfection when they test the limits of their lenses with imperfect techniques. I'm sure there are a number of genuinely decentered or badly BF/FF copies out there, but I often wonder whether good copies are being sent back at times when the tests done by users fail to impress them for reasons that can be explained by flawed testing. That's the vain of my earlier post here. One should be mindful to consider their lens as good until proven bad rather than the other way around.

Thread Tools	Search this Thread
	Search this Thread: Advanced Search