Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version 7 Likes Search this Thread
06-01-2020, 08:46 AM - 1 Like   #1
Pentaxian




Join Date: Dec 2011
Posts: 3,112
A reference for bad FF lens vignetting: Sony FE 24-105mm f/4 G OSS

I guess 5,34 stops of vignetting (essentially = black) is the record for a F4 lens.

https://www.opticallimits.com/images/8Reviews/lenses/sony_24105_4g/vig_24mm_f4.jpg


Sony FE 24-105mm f/4 G OSS (SEL24105G) - Review / Test Report - Analysis

Pretty abysmal for a 1,350 EUR zoom kit lens.

The DA* 60-250 is off the shelf FF then just as well...

06-01-2020, 10:02 AM   #2
Site Supporter
Site Supporter
luftfluss's Avatar

Join Date: Jun 2011
Location: NJ
Photos: Gallery | Albums
Posts: 11,629
QuoteQuote:
If you disable both distortion and vignetting correction, things are very different here though - specifically at 24mm. The extreme corners areessentially black in this case (please note the very different scale in the chart below) - thus the lens has been clearly underdesigned.Or in other words - the front element is too small. Please note that this sounds worse than it is. If we accept that distortion auto-correctionis really the default - and that's what Sony has configured - those black corners are gone.
.....
06-01-2020, 10:26 AM - 1 Like   #3
Pentaxian




Join Date: Dec 2011
Posts: 3,112
Original Poster
It is exactly these types of fanboy texts which destroy any credibility of so called review sites. They should stick to measurements and avoid such poor excuses.

The Sony gets rid of black / unusable corners by flat out cropping it away and the fan writer insinuates that the need to crop away poor image quality is the new normal. Not on a $100 lens. Not on a $1350 lens.

That is a smartphone quality approach.

The 55-300 PLM is a full FF lens by Sony and Opticallimits standards. bwahaha.
06-01-2020, 10:35 AM - 1 Like   #4
Site Supporter
Site Supporter




Join Date: May 2019
Photos: Albums
Posts: 5,976
So... What's the effective FOV of the Sony at 24mm? Because it sounds like they are selling a 28- zoom.

Suddenly I'm very glad that Pentax decided the D FA 28-105 started at 28 and didn't try to sell it as a 24...

Also, now I think I'm remembering a comparison between a couple primes (Canon and Sony 35mm?) where the Sony had a slightly narrower FOV... oh boy. The DPR readers will be livid when they tell them that Sony bakes in raw manipulation that actually, measurably, destroys detail.

06-01-2020, 10:39 AM - 1 Like   #5
Site Supporter
Site Supporter
luftfluss's Avatar

Join Date: Jun 2011
Location: NJ
Photos: Gallery | Albums
Posts: 11,629
Last year I shot a Fuji X-T20 with 15-45 and Pentax K-70 with 15 Ltd. side-by-side. Even with all of the corrections applied, the Fuji was at least 5% wider than the 15 Ltd and had better, more even sharpness across the frame.

I care less how the gear "gets there" than I do about the final result.
06-01-2020, 10:40 AM   #6
Site Supporter
Site Supporter
jlstrawman's Avatar

Join Date: Feb 2010
Location: Midwest US
Photos: Gallery
Posts: 1,058
vignetting on pentax lenses - Google Search
06-01-2020, 10:44 AM   #7
Site Supporter
Site Supporter
luftfluss's Avatar

Join Date: Jun 2011
Location: NJ
Photos: Gallery | Albums
Posts: 11,629
QuoteOriginally posted by Serkevan Quote
So... What's the effective FOV of the Sony at 24mm? Because it sounds like they are selling a 28- zoom.

Suddenly I'm very glad that Pentax decided the D FA 28-105 started at 28 and didn't try to sell it as a 24...

Also, now I think I'm remembering a comparison between a couple primes (Canon and Sony 35mm?) where the Sony had a slightly narrower FOV... oh boy. The DPR readers will be livid when they tell them that Sony bakes in raw manipulation that actually, measurably, destroys detail.
In my very limited experience, the advertised focal range of the lens is after corrections are applied. So that Sony lens might actually be 22mm before corrections, and then 24mm after.

06-01-2020, 10:57 AM   #8
Site Supporter
Site Supporter




Join Date: May 2019
Photos: Albums
Posts: 5,976
QuoteOriginally posted by luftfluss Quote
In my very limited experience, the advertised focal range of the lens is after corrections are applied. So that Sony lens might actually be 22mm before corrections, and then 24mm after.
Yeah, that's why I asked - if you still get an usable 24mm and "all" you are losing is a megapixel or so then it isn't *that* terrible from a practical point of view. If you lose FOV then that's a much worse thing :/
06-01-2020, 11:32 AM - 1 Like   #9
Site Supporter
Site Supporter
Alex645's Avatar

Join Date: May 2015
Location: Kaneohe, HI
Photos: Albums
Posts: 3,527
QuoteOriginally posted by luftfluss Quote
.....
This reminds me of the Boeing 737 Max. Designed and manufactured with known physical deficiencies. Fixed with software and the user (pilot or photographer) just has to learn skills on how to handle the camera when the software fails.

I dread the day when cameras become homogenous and the firmware and processor is the only appreciable difference. Jpegnon, Jpegony, and Jpegtax.
06-01-2020, 12:25 PM   #10
Digitiser of Film
Loyal Site Supporter
BigMackCam's Avatar

Join Date: Mar 2010
Location: North East of England
Posts: 20,707
Moved to Non-Pentax forum...
06-01-2020, 02:21 PM   #11
Pentaxian




Join Date: May 2015
Photos: Albums
Posts: 3,306
QuoteOriginally posted by luftfluss Quote
Last year I shot a Fuji X-T20 with 15-45 and Pentax K-70 with 15 Ltd. side-by-side. Even with all of the corrections applied, the Fuji was at least 5% wider than the 15 Ltd and had better, more even sharpness across the frame.

I care less how the gear "gets there" than I do about the final result.
Thats the thing, you might still get better results with the upsampled, software corrected crop than you do with a proper lens.
06-01-2020, 04:32 PM - 1 Like   #12
Pentaxian
ChristianRock's Avatar

Join Date: Jul 2013
Location: People's Republic of America
Photos: Gallery | Albums
Posts: 9,912
Sony gets away with anything it does these days...
06-01-2020, 06:27 PM   #13
Otis Memorial Pentaxian
Otis FanOtis FanOtis FanOtis FanOtis FanOtis Fan
Loyal Site Supporter
clackers's Avatar

Join Date: Jul 2013
Location: Melbourne
Photos: Albums
Posts: 16,397
24 is too wide to try to put in a FF zoom past 3x.

It should've been a 28-105.

Remember most people end up shooting only with the wide end or long end.
06-01-2020, 10:21 PM   #14
Pentaxian




Join Date: Jul 2011
Posts: 2,389
The photoshop vignette overlay is built in guys. It’s a feature!
06-02-2020, 12:42 AM - 1 Like   #15
Otis Memorial Pentaxian
Otis FanOtis FanOtis FanOtis FanOtis FanOtis Fan
Loyal Site Supporter
clackers's Avatar

Join Date: Jul 2013
Location: Melbourne
Photos: Albums
Posts: 16,397
QuoteOriginally posted by zapp Quote
The photoshop vignette overlay is built in guys. It’s a feature!
Sure, but you don't get back that data, and you make the noise more visible. The resolution has taken a huge hit and you have to crank up the sharpness sliders to compensate. Just trying to artificially postprocess a way out of the problem!

This seems fully accepted in the mirrorless world, though, even in RAW files, it is rumoured.
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
f/4, fe, ff, ff lens, k-mount, lens, oss, pentax lens, slr lens, sony

Similar Threads
Thread Thread Starter Forum Replies Last Post
Adaptadores lentes Pentax k-Sony FE Adapters lenses Pentax k-Sony FE Pentax K2 Pentax Camera and Field Accessories 5 03-27-2019 02:59 AM
For Sale - Sold: Sony Alpha A6000 & Sony SEL50F18 oss lens landrew Sold Items 1 09-30-2018 04:07 PM
Lens Teardown of the Complicated Sony FE 70-200mm f/2.8 GM OSS Winder Canon, Nikon, Sony, and Other Camera Brands 2 02-25-2017 07:25 PM
For Sale - Sold: Pentax FA 24mm f2.0 and Sony Nex 5R (wifi, touchscreen) with 18-55 OSS, flash etc Cooler Sold Items 2 01-08-2017 11:26 AM



All times are GMT -7. The time now is 07:11 AM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top