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Forum Index > Optics > S-TAC vs SIII

S-TAC vs SIII

11 May 2024
@ 10:43 am (GMT)

marcos

Hi
I am going to buy my first long range scope. I have decided that it will be a Sightron, but I am hesitating between these two models:
S-TAC 4-20 x 50 FFPZS IRMH FFPZS
SIIISS624x50LRCM/MD

The STAC has zero stop and ffp reticle, the SIII is sfp with the turret markings in gold color, characteristic of Sightron, it doesn't have zero stop.
Basically they cost almost the same here, I understand that the SIII is superior quality, but there are many opinions about it.
Any suggestions or advice?

Thanks
All the best


Translated with DeepL.com (free version)

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13 May 2024
@ 07:38 am (GMT)

Nathan Foster

Re: S-TAC vs SIII
Hi Marcos, sorry I have blundered this. Will start fresh with comparative specs specs and with regards to low light shooting, minimum zoom.

Here is a video showing the standard S-Tac 6x24 reticle:

https://www.youtube.com/watch?v=_eZn7m8vfVo

Scope in the video is set at 4x resulting in .5 MOA reticle thickness at 100 yards.

.5 MOA divided by 3.438 = .145 mils.


The S-Tac FFP mil reticle is .035 mils.

.035 x 3.438 = .120 MOA.

The SIII mil dot reticle is .096 mils which equals .33 MOA (over twice as thick as S-TAC FFP scope)

I wrote about the issues regarding FFP scopes in Long Range rifles, second edition. The reticles are now so thin that the maker has no choice but to add illumination. It is not an 'additional feature' but rather a fix for a problem created by the idiotic tactical crowd. One of the sales reps at Sightron had told me that they had improved the reticle of the S-Tac but looking at the specs, I cannot see any improvement.

Taking all of this into consideration, I recommend the SIII mil dot. You don't really need the zero stop, just make a note of the zero hash mark on your chart. There are also notes on generating a wind column for your chart, versus the mil dot reticle - within the technical section of my book long range shooting. You also don't really need FFP once you get to know your kit.

As an aside, the reticle thickness of the SIII MOA-2 scope is .3 MOA @ 6 power.

OK, hope this provides a clear comparison.
14 May 2024
@ 10:07 am (GMT)

Marcos García

Re: S-TAC vs SIII
Thank you Nathan.
I hadn't thought of it that way, I should have done the math.
At 24x the thickness of the SIII reticle is .024 Mils.
The STAC FFF reticle thickness is .035 Mils.

The classic SIII mil-dot is thicker at low power/low light, even thinner at long daylight distance.
I've already made up my mind.

I can’t thank you enough.
Best wishes.
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