Q&A: for Mads (regarding Sigma lenses for Nikon).

Sigma 35mm 1.4 ART - Prosophos

On an earlier post, Mads asked if I had to test several copies of my recently acquired Sigma 35mm f/1.4 ART lens, before deciding on the one I own.

The answer is: no.   The first one I evaluated was perfect.

My camera dealer’s Nikon D810 has been calibrated (by Nikon) and the Sigma 35 I tried was focusing perfectly at near focus, mid-distance, and infinity.  On my D810, which is not perfectly calibrated, I need to set the camera to +5 micro-focus adjustment.  This is the same adjustment I need to make to my Nikon 85mm 1/4G (which is also functioning perfectly), in order to achieve proper focus on my camera-lens combination.

I additionally tried out a used copy of the Sigma 50mm f/1.4 ART, and it was focusing perfectly.   My dealer also had a new copy of the same lens, but it was unfortunately front-focusing by about an 3 cm (this shouldn’t dissuade people from buying Sigma lenses… the first few Nikon 58/1.4G lenses I tried were also a little off, and — as already stated above — so is my Nikon D810).

I hope that helps, Mads.   By the way, if you ever plan on visiting Toronto, let me know and it will be my pleasure to welcome you to my city.

—Peter.

Advertisements

7 thoughts on “Q&A: for Mads (regarding Sigma lenses for Nikon).

  1. Mads says:

    Thanks, Peter. I feel honored to have a post dedicated to me. And thanks for the info on lens calibration. For me this part is still a bit new, as my previous lenses all seemed perfect AF wise. Then I upgraded to 35mm 1.4G and 85mm 1.4G and both needed fine tune (+7 and +17). This could indicate, that my D750 is back focusing a bit in general. I think after xmas and new years, I’ll take the lenses and camera to Nikon Service to have them calibrated together. +17 seems a bit high. But reassuring to know this is normal, and nothing to worry about.
    Apart from that I’m enjoying both lenses very much – they are by far the best glass, I have owned, and I feel, I have the perfect lens duo now. My old lenses have all been sold off.
    Thank you so much for your kind offer, if I should find myself in Toronto some day. Would love to visit your city and Canada in general. As you know, this goes both ways, as I would take great pleasure in welcoming you to Copenhagen, if you should ever find yourself around these shores.
    Sincerely,
    Mads

    • Mads, +17 is a little high, but I am grateful that Nikon (and other manufacturers) allow for such fine-tuning to allow us to use our equipment to its full potential.

      On another note, the honour is all mine, my friend.

      • Mads says:

        Thank you, my friend.
        But I should just view the +17 as being a little high, and then just get it calibrated by Nikon Service, right? Not worry or stress about having a faulty lens? I suppose it’s simply tolerances being so fine and high resolution digital now exposes this, hence the fine tune feature. Sorry for all my questions.

        • Yes, that’s how I would view it.

          But… if you are still able to exchange it at your dealer for another lens, that is the quickest route to getting a lens close to the intended spec. Otherwise, a trip to Nikon should straighten things out… To be honest, though, one can make the point that no action is required, if the lens is working perfectly at +17… but I’ll leave that up to you to decide.

  2. andygemmell says:

    Thanks Peter. This is very informative and appreciate the post.

Leave a Comment

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s