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04-18-2013, 03:04 PM   #91
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QuoteOriginally posted by i83N Quote
Have you seen how much space on sensors is left unused because pixels are round and big.
That used to be a problem in old designs. But with modern micro-lenses, the fill factor is quite large. FF can also be improved with a hexagonal sensel shape and staggered arrangement in the array. This has been done in the past.

Dan.

04-18-2013, 03:05 PM   #92
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Looks like a lot of fun, But I think I'll rather get the New Ricoh GR than the Sigma

04-18-2013, 03:11 PM   #93
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Wow - 7 pages of conjecture for a lens that is not even available for Pentax...........
04-18-2013, 05:35 PM   #94
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QuoteOriginally posted by stormtech Quote
Wow - 7 pages of conjecture for a lens that is not even available for Pentax...........
Hilarious isn't it - The argument between the self proclaimed sensor experts was the most entertaining though

I won't sleep for months now I know there's gaps between those pixels

04-18-2013, 06:35 PM   #95
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Didn't you know that? (slaps forehead) If you were professional, you would be using bathroom silicone to fill the gaps in your sensor. I've been doing it for years now. All my clients notice the difference and comment on it. I don't have any photon leaks from my sensor.
04-18-2013, 07:50 PM   #96
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I'm currently fabricating 16million tiny alumimium foil photon funnels! I shall carefully attach them to each pixel with Blu Tak to increase their light gathering capabilities. This should also reduce the dreaded Yellow Colour Noise™
04-18-2013, 07:51 PM   #97
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QuoteOriginally posted by i83N Quote
If Sigma did it so should and other companies. Pentax shod drop FF plans and make lens like this or better.
How much would you expect to spend on a Sigma FF 28-55mm F/2.8, keeping in mind that the 24-70 F/2.8 costs $824?

Perhaps $500? $600?
04-18-2013, 07:53 PM   #98
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QuoteOriginally posted by Unsinkable II Quote
Under $1K and I think they'll sell very well.
Yes, but I'm guessing it's $1500-$2000

04-18-2013, 07:54 PM   #99
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QuoteOriginally posted by Quicksand Quote
I imagine their Pentax K-mount sales would be considerably higher than their Sigma SA-mount sales.

And yet they are making it for the latter.
There's only mechanical differences between the sigma mount and the canon mount.
04-18-2013, 09:17 PM   #100
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The size and weight would be comparable to my Sigma 85mm with the hood attached, and I find that lens to be easy enough to handle on my K-30. Assuming that the 18-35mm has good image quality, I would be very excited to own this lens. It would pair very well with my Sigma 50-150mm f/2.8 and/or the 85mm 1.4.

But like the 120-300mm f/2.8, it looks like the 18-35mm f/1.8 is not coming to Pentax-land. This is sad and frustrating for me since I don't want to own a DSLR without SR on the sensor, but most of the cool new lenses are only coming out for cameras that don't have SR.
04-18-2013, 09:34 PM   #101
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QuoteOriginally posted by ElJamoquio Quote
Yes, but I'm guessing it's $1500-$2000
At that price, it is pointless.

Only enthusiasts are going to buy this lens, because they want to go wide and fast.

Solution A: Enthusiast-level APS-C (say US$1K) + this $1.5K to $2K Sigma. Total: $2.5K to $3K for a fast, wide, 2X zoom solution.

Solution B: D600 / D6 at $2K and a standard $500 2.8 zoom. Total $2.5K for a fast, wide, 2.5X to 3X zoom solution.

Sigma will need to price this sensibly if they want to sell many.
04-19-2013, 12:20 AM   #102
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QuoteOriginally posted by gazonk Quote
Of course not. And it's a great achievement and may be good for Sigma because of the press it gets. But which tiny fraction of the Canikon market consists of customers that are willing to buy such an expensive, large and heavy wide angle/standard zoom lens - and who do not already own a full format body?
1] 'such an expensive' -- You don't know what it will cost. Currently price is 100% guess/speculation.

2] Another assumption - large and heavy is subjective - It doesn't look too large or too heavy to be uncomfortable for me. I'm sure I'm not the only one who places size nd weight a lot lower down than optical specs.

3] You're only focussing on the canon/nikon market because of it's initial mount options. Why would pentax owners feel any different ( if it was available in k mount ) ?
04-19-2013, 12:21 AM   #103
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QuoteOriginally posted by Unsinkable II Quote
At that price, it is pointless.

Only enthusiasts are going to buy this lens, because they want to go wide and fast.

Solution A: Enthusiast-level APS-C (say US$1K) + this $1.5K to $2K Sigma. Total: $2.5K to $3K for a fast, wide, 2X zoom solution.

Solution B: D600 / D6 at $2K and a standard $500 2.8 zoom. Total $2.5K for a fast, wide, 2.5X to 3X zoom solution.

Sigma will need to price this sensibly if they want to sell many.
I think they will.
04-19-2013, 12:27 AM   #104
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QuoteOriginally posted by Smeggypants Quote
3] You're only focussing on the canon/nikon market because of it's initial mount options. Why would pentax owners feel any different ( if it was available in k mount ) ?
For Pentax owners it would make more sense since there's no FF alternative, but that's pure speculation at this point - maybe a Pentax FF has been announced by the time the Sigma is available in K-mount?
04-19-2013, 12:29 AM   #105
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QuoteOriginally posted by jogiba Quote
No, it's not. I'd probably never use such a lens even if I got it as a gift (the Pentax 18-135 is a different beast, might make sense on rainy days).

What's your point?
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