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R5 w/RF 100-500 pics

Started 3 months ago | Discussions thread
Shawn1519 Forum Member • Posts: 68
Re: R5 w/RF 100-500 pics
1

Caseydc wrote:

ThrillaMozilla wrote:

Caseydc wrote:

Im fighting the urge to buy a 100-500. The F7.1 is what is holding me back. The results are hard to argue with though.

Why? It has the same aperture diameter (500mm/7.1 = 70 mm) as a 100-400 f/5.6 lens. At the same subject distance that means (1) the same depth of field; (2) the same distant background blur; and (3) the same number of photons collected from the duck.

Tamron, Sigma, and Sony zoom lenses all reach 600mm with an f6.3 aperture, while we are limited to 500mm at a slower f7.1

I have a very sharp copy of the Sigma 150-600 sport, and it is pretty soft (to me, unusable) at F6.3.  At 7.1 it is quite a bit better, but really need to stop it down to F8 before it will produce good images.  i.e. there is not much gain to have a F6.3 lens that is too soft to use wide open.  I have similar experience with the Tamron G2 lens.

Aperture does matter.  I know the 500/600 F4 lenses are in a different league, but F4 over F7.1 (or F5.6 vs F10 with 1.4x tele) makes a huge difference.  The F4 lenses focus better in really low light, and the bokeh of the F4 lenses are night and day better than the 100-500 lens at f7.1.

Shawn

Just doesn’t seem that competitive to me, but their design philosophy is geared more towards portability. I would have preferred a tiny bit bigger lens, a little more reach, or a little faster aperture with the ability to actually fit the teleconverter properly.

I almost bought one last week and probably will, but doesn’t give me a warm fuzzy feeling.

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