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**Klaus** · (This post was last modified: 08-07-2021, 04:40 AM by Klaus.)

https://www.opticallimits.com/sonyalphaf...amron35f28

Sorry, Sydney is in lockdown thus no sample images at this point.

toni-a · 07-10-2021, 04:54 AM

on the resolution chart, aperture values are not visible

**Klaus** · 07-10-2021, 05:41 AM

Uups, should be fixed now (unless you have a cached file locally)

Brightcolours · (This post was last modified: 07-10-2021, 06:58 AM by Brightcolours.)

"This visual comparison should also make it obvious how big the Tamron lens vs other lenses in this speed class."
How big the Tamron lens is.

"We haven't tested the Samyang yet but it seems to be pretty good and it is, by quite a margin, more compact still."

More compact still, refers to the Zeiss... Still more compact than the Zeiss is compared to the Tamron. But the Samyang is not more compact than the Zeiss "by quite some margin". Length wise the difference is 3.5mm. Diameter size difference: the Samyang is 0.3mm wider.

By the way, for some reason the camerasize website shows the Samyang a bit smaller than it is.

"The most tricky question is probably why you should want to buy such a lens? Usually you purchase a prime lens because it is superior in quality or because it's fast or maybe because it's simply special in some respect."
The special part is what you pointed out only in the sentence before thatone: 1:2 max. magnification.

"The Tamron 35mm f/2.8 Di III OSD M1:2 produces a negligible barrel distortion in RAW files."
It produces a negligible barrel distortion.

"A 35mm f/2.8 doesn't quality as overly fast by prime lens standards "
Doesn't qualify.

"...but the more edgy aperture shape is getting very obvious from f/5.6 onward."
Corners are not edges.... Circles have en edge too (one edge: its circumference). Where the edges in polygons meet are vertices or corners. Tricky to say what you mean correctly... Yes, a heptagon has more edges (7, versus 1 of a circle), but just as much edge. And a shape with more edges gets more and more smooth, until you call it a circle and it only has one edge, basically. So, "more edgy" does not cover it.

Rover · 07-10-2021, 08:51 AM

You added the link to the Industry News list by mistake... Smile

stoppingdown · 07-10-2021, 01:14 PM

Yep, the basic point for this lens is 1:2 repro ratio (1:1,3 with APS-C).

Brightcolours · 07-10-2021, 01:15 PM

(07-10-2021, 01:14 PM)stoppingdown Wrote: Yep, the basic point for this lens is 1:2 repro ratio (1:1,3 with APS-C).

No, also 1:2 with APS-C...

stoppingdown · (This post was last modified: 07-10-2021, 03:36 PM by stoppingdown.)

Yep, you're right. I rewrite: on APS-C a smaller subject fills the sensor.

I have to fix my review of the lens.

Brightcolours · 07-10-2021, 04:23 PM

(07-10-2021, 03:35 PM)stoppingdown Wrote: Yep, you're right. I rewrite: on APS-C a smaller subject fills the sensor.

I have to fix my review of the lens.

The bigger subject in the image is a more important property in photography, yet we have no simple way to talk about it... we are stuck with the magnification definition for lenses.

davidmanze · 07-11-2021, 11:58 AM

(07-10-2021, 06:25 AM)Brightcolours Wrote: "This visual comparison should also make it obvious how big the Tamron lens vs other lenses in this speed class."
How big the Tamron lens is.

"We haven't tested the Samyang yet but it seems to be pretty good and it is, by quite a margin, more compact still."

More compact still, refers to the Zeiss... Still more compact than the Zeiss is compared to the Tamron. But the Samyang is not more compact than the Zeiss "by quite some margin". Length wise the difference is 3.5mm. Diameter size difference: the Samyang is 0.3mm wider.

By the way, for some reason the camerasize website shows the Samyang a bit smaller than it is.

"The most tricky question is probably why you should want to buy such a lens? Usually you purchase a prime lens because it is superior in quality or because it's fast or maybe because it's simply special in some respect."
The special part is what you pointed out only in the sentence before thatone: 1:2 max. magnification.

"The Tamron 35mm f/2.8 Di III OSD M1:2 produces a negligible barrel distortion in RAW files."
It produces a negligible barrel distortion.

"A 35mm f/2.8 doesn't quality as overly fast by prime lens standards "
Doesn't qualify.

"...but the more edgy aperture shape is getting very obvious from f/5.6 onward."
Corners are not edges.... Circles have en edge too (one edge: its circumference). Where the edges in polygons meet are vertices or corners. Tricky to say what you mean correctly... Yes, a heptagon has more edges (7, versus 1 of a circle), but just as much edge. And a shape with more edges gets more and more smooth, until you call it a circle and it only has one edge, basically. So, "more edgy" does not cover it.

It produces a negligible barrel distortion. ....... X

It produces negligible barrel distortion !!

You seem to be finding mistakes everywhere BC ...... in everything !!