Sigma 18-35 f/1.8

Rapscallion said:
But they will still need the same exposure wouldn't they?

ie
fx, f2.8, iso 100, 1/100s

will give the same exposure as

dx, f2.8, iso 100, 1/100s
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Correct they gather the same amount of light, the lens will behave like a F2.7 DOF-wise
 
TonyNI said:
I'm looking forward to seeing how this lens is reviewed. I originally, would never have entertained buying a sigma lens. Years back their target market was lower cost, cheap lenses. The last 3 sigma lenses I have owned have blew me away (70-200 OS, 35 1.4 and 85 1.4)

Out shooting this morning with the 70-200 on the D800 and its razor sharp. Done a shoot on Sunday with the 85 1.4 and it is astonishing.

I hope they keep up this trait. The 35mm 1.4 has set the bar high for them seeing as it betters both of canon and nikons offerings. The days of 3rd party lens snobbery should be numbered
Click to expand...

I for one cannot wait for the mini review.
 
That is huge, I would rather just have two primes (a 35 and a 50) as no doubt it won't be cheap.
 
Rapscallion said:
A question regarding a comment on dpreview

They say:
"The lens will offer the light-gathering and depth-of-field equivalent of a constant F2.7 on full-frame,"

I thought that light gathering ability did not change across formats?
Click to expand...

I think there's some debate on that in the DPR thread. It's correct as the OP stated/intended, but confusingly expressed as most folks would interpret it.

It's an interesting lens, but predictions of high price may well be true and I wonder how many Sigma will sell. If you want low light capability and shallow DoF, then full-frame offers a better set of compromises. And if you're committed to APS-C, then primes are a good alternative at shorter focal lengths as foot-zoom is easier.

This lens though, and a couple of others, are certainly getting Sigma seen in a new light these days. No more than they deserve IMHO :thumbs:
 
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