Chris_88 Offline Upload & Sell: Off
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GMPhotography wrote:
Just wait till Fred tests this damn thing. You all know how I feel about reviews. I trust Fred and very little otherwise unless I’m testing too. So just hold on to your cash until we see some real tests. Need advice just ask. I’m still around but in a quiet zone now. 
This is my game plan, Guy. No intention of spending all that money based on "reviews" by artisans, brand ambassadors, whatever. I like Albert's (Dros) work a lot and I think he is honest and straight forward, but I'd like to see more systematic tests, which is what among other things, Fred excels at.
Fred Miranda wrote:
[The new 12-24/2.8 GM is a stop faster which makes it a better 'milky-way' lens. If that's your thing and you want 12mm, the choice is easy...and expensive. 
There are other differences like the number of apertures blades (7 vs 9) which gives them a different sunstar shape. the GM will have 18 points and the G 14-point stars. From the images I've seen so far, the GM's sunstars seem to have better definition at small apertures but I have not seen any side by side comparison. There is also flare resistance to keep in mind which is still a question mark.
If you rarely shoot 12mm, the Sigma 14-24/2.8 DN DG is the lens to get for the IQ and price. It even performs even better than the G zoom but we are splitting hairs. They are both fantastic lenses. The Sigma's aperture has 11 blades which means 22-point sunstars.
The first question is: How much do you shoot at 12mm. Would you be happy with 14mm as your widest focal length? if the answer is yes, just get the Sigma 14-24/2.8 DN DG and you're done.
Here is sunstar example with the Sigma 14-24/2.8 @14mm@:
(One separate exposure at f/18 just for the 22-point sunstar)
...Show more →
Impressive shots as always, Fred. The sunstars on the official Japanese Sony page for the GM looked OK (at f8), but as you mention flare performance is still a bit of a mystery.
May be it's because I've been using 14mm primes for years to do astro, but I don't find 14mm extremely wide (even though compositions at those FL's definitely need to be handled with care).
I kinda miss the option of going all the way to 12mm. The shot below was taken with the CV 12, when I still had that. I wasn't happy with the corner perfromance on the r3's 42MP sensor and since sold mine, but I end up missing the 12mm more than I thought I would.

Fred Miranda wrote:
Another way to looks at this is in terms of value and convenience. Most of us think $3,000 is a lot of money for a zoom lens but consider that if you want to add a 12mm f/2.8 prime to complement your 14-24/2.8 lens, you would pay $950 for it. (Laowa 12mm f/2.8 Zero-D Lens for Sony E)
So, the Sigma 14-24/2.8 + Laowa 12/2.8 would cost $2,400 and you would have to carry 2 lenses for a total weight of 1,410 grams vs only 850 grams for the GM. On top of that the 12mm performance would not be as good as the GM.
The Voigtlander 10mm and 12mm are not cheap either and two stops slower at f/5.6....Show more →
I was thinking along similar lines, Fred. I currently have too many ultra-wide/wide lenses. No matter what I will keep the Loxia 21, but if I sell all the others, the GM might be within reach as allow me to slim down my kit a bit.
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