Just pulled the trigger on M6II + 32 f1.4

Started 5 months ago | Discussions thread
thunder storm Senior Member • Posts: 7,698
Re: Just pulled the trigger on M6II + 32 f1.4

Mongrel wrote:

thunder storm wrote:

MAC wrote:

I may also eventually get a 56

I did some shooting with both the RF 85mm f/2.0 IS stm and the sigma 56mm f/1.4 today.

Some observations:

The sigma needs a bit faster shutterspeeds compared to the RF 85mm f/2.0 IS stm (1/200th or so).

The sigma - although being an unstabilized prime - seams to suffer a bit from shutter shock. 1/100th is a too long shutterspeed anyway, but using full mechanical at this shutter speed gives noticeable worse results compared to electronic shutter at 1/100th.

The RF 85mm f/2.0 at f/2.2 gives has less problems with the 45Mp R5 than the sigma at f/1.4 (= f/2.2 equivalence) with the 32Mp M6II wide open.

Conclusion: both the RF 85mm f/2.0 IS stm and the ef-m 32mm f/1.4 are better lenses for both sharpness and low light.

The sigma 56mm is a good lens, compact and affordable and it can free up your RP from the 85mm f/2.0 IS stm for something else, however, it's not the best option for low light and the RF 85mm is better.

Honest question, and perhaps coming from a place of complete ignorance…

But how does “shutter shock” effect one lens more than another (barring IS)?

and…

How is 1/100th “too long” of a shutter speed for 56mm lens, when as a rule of thumb, shutter speed should equal focal length (generally speaking) for best results hand holding?

Bryan Carnathan (known from The Digital Picture) has said it would be better to use this formula for - at the time - new crop sensors like the 20Mp sensor of the 70D:

1/2fl

That would be 1/112th for this lens in stead of 100th.  The 56mm is a very sharp lens, it's a very light lens, and the M6II is a light camera, and it's 32Mp in stead of 20Mp.

Or is this in reference only to the M6-2 being sensitive as a body to shutter shock?

No.

Just not sure how shutter shock is impacted by the lens? Weight maybe?

My comment was based on results with (full) electronic shutter compared to results with (full) mechanical shutter.

Like I said…I am willing to confess being a little number than the average dog on the issue…lol.

thanks

You're welcome.

To give you some perspective: I've used the 1.5 Kg Sigma f/1.8 Art at 50mm at 1/100th on a 24Mp sensor with no camera shake issues at all.

I've also used a 105mm on full frame finding  without IBIS 1/200th was a too long shutter speed for this lens and 1/250th was the minimum.

Rules of thumb are great, but I always run some tests with new lenses and/or new bodies to see what a combination can do for me.  It's also situations dependent.  If you've been running a while to get a shot, make sure to use a faster shutter speed than usual, even if the you want to keep the ISO down, as in these circumstances you simply can't hold the camera as steady as in normal circumstances.

-- hide signature --

I love 50mm (equivalence)

 thunder storm's gear list:thunder storm's gear list
Canon EOS M6 II Canon EOS R5 Canon EF-S 15-85mm f/3.5-5.6 IS USM Canon EF 35-80mm f/4.0-5.6 III Canon EF 24-70mm F2.8L II USM +18 more
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