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06-01-2020, 08:46 AM - 1 Like   #1
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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
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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
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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
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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
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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
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vignetting on pentax lenses - Google Search
06-01-2020, 10:44 AM   #7
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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
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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
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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
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Moved to Non-Pentax forum...
06-01-2020, 02:21 PM   #11
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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
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Sony gets away with anything it does these days...
06-01-2020, 06:27 PM   #13
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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
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The photoshop vignette overlay is built in guys. Itís a feature!
06-02-2020, 12:42 AM - 1 Like   #15
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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.
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