![]() ![]() Take a look at the PF review: Sigma 30mm F1.4 DC HSM 'Art' - Autofocus - Pentax Camera Forums Contrary to what it says in the PF review, I have seen online discussions of similar problems with Canon and Nikon versions of the Art 30. Its sloooooow focus and/or failure to focus. karl ellers gear list: Nikon D5100 Nikon AF-S Nikkor 50mm F1.8G Sigma 30mm F1.4 DC HSM Art Nikon AF-S DX Nikkor 55-300mm f/4.5-5.6G ED VR. The issue with the Art 30 is not back focus or front focus. At first I thought it was just a problem on the 19/2.8s limited AF capability, but it seems like the bug still persists on the 30/1.4. The focus would just wobble around indefinitely without being able to lock on. Bokeh is really nice wide open, Im always pleased with the results, and sharpness is good with no complaints. That seems to be a problem with Sigmas AF implementation as the same thing also happens with the Sigma 19/2.8. Newspapers work well too at a 45deg vertical angle.ħ0D | Tokina 12-24 | Tamron 17-50 f/2.8 | Canon 28-135 IS| 430EXĪstrophotograpy: QHY268m, Astronomik Deepsky LRGBHaO3S2 filters, Meade 10" SCT, Astrotect 130EDT APO (.8x), iOptron CEM60 to keep it all off the ground. 4.8 out of 5 3,898 global ratings Sigma 30mm F1.4 Contemporary DC DN Lens for Sony E by Sigma Style: Single Change Write a review How customer reviews and ratings work Top positive review All positive reviews Long Long Honeymoon The Loloho Review: 'Sharper than a Hanzo sword. Its heavier than the 35 or 50mm f/1.8G, but it doesnt unbalance the camera. :( Should I send it back and get a new one or send it to Sigma to get calibrated (would Sigma charge for that) What are your experiences with getting a new lens that either front or back focuses. Despite some issues, everyone seems to love the sigma and the recent few update was a bright point. The Sigma 30mm f1.4 would work, it is just not the best tool for the job. I sent the lens off for a warranty repair, and its better now. Straight on is best to determine where the focal plane is. Hey, I just bought a new Sigma 30mm f/1.4 lens and it has some significant back focusing going on. In the same article the calculator gave me 11sec at iso1600 30/1.4 for the sigma vs 28sec at iso1600 12/2 for the samyang both targeting a neutral. It also had back focus issues, especially in backlit/low light situations. My Sigma 30mm Contemporary f/1. Not sure if this is the right subreddit but: I use my a6100 as a webcam for zoom calls and I keep running into an auto-focused issue. Looked like the 50mm 1.8 is front focusing a little but still sharp at the "Focus Here" line.įocusing can cancel out too.imagine say 2mm lens backfocus and 3mm body front focus = 1mm front focus.Īll things are not created equal and have play, tolerances, etc.ĭon't shoot remotes at a diagonal (left/right) angle. Sigma 30mm Contemporary f/1.4 on a6100 Focus Issue. If the point is within the depth of field (amount of in focus distance) then don't sweat it too much. It works now.īackfocusing is when the sharpest plane of focus is behind your intended focal point. I just went round and round with Canon until they put a new SPC sensor in. ![]()
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