Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Lenstip review of the Sigma A 105mm F1.4 HSM.
#41
The sketches I saw of the rumored adapter did show a mirror. Lenses for mirrorless often are made with linear motors and/or clutches to focus manually - else it's focus by wire or entirely manually driven focus. I don't know enough about that to say, it's only about PDAF on sensor - lenses should also be involved. I also don't know the reason for the pattern on Fuji's 24 MP sensor, and no pattern on Sony's 45 MP sensor.

But there's nothing wrong . if doable - to let PDAF quick focus and CDAF do the fine work.

So, basically I would not be surprised if the new mirrorless uses the "same" sensor, but maybe another underlying circuit. What do I know?

Back to the lens, originally used to start this thread: It's kind of amazing to me: the company importing the Sigma lenses into Switzerland offers lens rentals and charges 10% of the new recommended price. As they state, this price is high enough to not compete with local photo dealers - basically a good thing. As they ask CHF 1975.- I'm a bit surprised to have to pay 217.- for one week. Same time for the Nikon: 107.-

The Sigma is available at the two dealers I usually look for the prices: One wants 1589.- for the lens, the other 1369.- (but probably without the special lifelong" service for free once a year" warranty). Available in Nikon, Canon and - yes - Sony mount.

The Nikon goes for nearly 2k at both dealers.

In general, I'm still happy with my Sigma lenses - the 85 Art being an exception. Last year I tried one copy at a sales show to compare with the Nikkor: AFMA out of range. I rented one last December: AFMA needed a combination of in-camera adjustment AND dock adjustment, at closest range it was +16+11 (+27). Then I bought one and again, I needed to find an AFMA with dock and in-camera correction. Just to find out now, that the sttings I intensely tested didn't work well a couple of months later. I have no idea why and how, but the discovery of out-of-focus pictures never is a nice thing. 135/1.8 is so much better in that aspect.

Altough some of the lenses for Canon already got firmware version of 2.00 and above, the Nikon types remain at 1.00 (except the 35/1.4 Art, that's already on 1.03 for Nikon (and 2.01 for Canon). There's no real reason (else than a strange behaviour of one lens in terms of AF) to suspect malfunctions, but why need the Canon versions so much firmware? And are the Nikon firmwares just easier to do?

The 85 is optically outstanding, yes, but if it doesn't AF well, nobody will see the outstanding performance. At the moment I can't recommend the lens anymore.

And the 105 has much more glass, so I'm already a bit biased and sceptical.
  


Messages In This Thread
RE: Lenstip review of the Sigma A 105mm F1.4 HSM. - by miro - 07-14-2018, 03:02 PM
RE: Lenstip review of the Sigma A 105mm F1.4 HSM. - by miro - 07-14-2018, 12:04 PM
RE: Lenstip review of the Sigma A 105mm F1.4 HSM. - by miro - 07-14-2018, 12:35 PM
RE: Lenstip review of the Sigma A 105mm F1.4 HSM. - by miro - 07-14-2018, 01:12 PM
RE: Lenstip review of the Sigma A 105mm F1.4 HSM. - by miro - 07-14-2018, 04:55 PM
RE: Lenstip review of the Sigma A 105mm F1.4 HSM. - by miro - 07-17-2018, 10:13 AM
RE: Lenstip review of the Sigma A 105mm F1.4 HSM. - by JJ_SO - 07-19-2018, 07:45 AM
RE: Lenstip review of the Sigma A 105mm F1.4 HSM. - by miro - 07-21-2018, 09:08 AM
RE: Lenstip review of the Sigma A 105mm F1.4 HSM. - by miro - 07-21-2018, 01:25 PM
RE: Lenstip review of the Sigma A 105mm F1.4 HSM. - by miro - 08-01-2018, 07:40 AM
RE: Lenstip review of the Sigma A 105mm F1.4 HSM. - by miro - 08-03-2018, 12:23 PM

Forum Jump:


Users browsing this thread:
1 Guest(s)