[UPDATE the following morning: That was interesting—the information in the post below, which I wrote yesterday using information from Sigma's and B&H's websites, is now obsolete and no longer correct. Literally overnight, not only have some of B&H Photo's listings for some of the I-Series Contemporary lenses changed, but Sigma's own web page for those lenses has changed as well. Sigma no longer includes the DG DN lenses on the Contemporary lenses page, but has added them to the "Discontinued" page. (It's also possible my search yesterday turned up an outdated page.) And several of the lenses I said were still available at the old prices at B&H Photo are no longer listed or are now listed as "Discontinued." It looks like the 65mm lens is the only one still available in L-mount at the old price. But I didn't check them all. Several of the older DG DN lenses look to still be available in Sony E mount at the old prices also. 

A couple of things I missed: the 45mm ƒ/2.8 DG (new style) (now $619, vs. the old price of $449) does feature a change: it now takes the magnetic lenscap used across the rest of the line, according to DPReview. And the obvious one: these lenses are now available in silver versions, to match the silver BF. —Mike]

I shoot Sigma L-mount now, and the other day I noticed something that outwardly looked weird. Some of the Contemporary series of lenses seemed to have a subtly new designation—the older lenses were "DG DN" and the newer lenses are just "DG." Not just on the sale pages; the change is also printed on the lenses themselves.

(Note: These illustrations show just the lower
part of the lens, not the whole lens)

This is the older and newer Contemporary 35mm ƒ/2. Note the printed lens designations.

Then I noticed something else weird. On the Sigma page for the lenses, both versions are listed and illustrated, but they don't seem to be right next to each other. For example, this 35mm ƒ/2 DG DN is in the middle of one row and plain DG is at the beginning of the next row down. The 24mm ƒ/3.5 has three lenses in between the DG DN and the DG. 

In Sigma-speak, DG is a lens for full-frame, and DN signifies (sigmafies?) a lens for mirrorless. So why did the "DN" disappear? 

I know, the suspense it killing you, so I'll cut to the chase. The old and new lenses are exactly the same. No changes. The new lenses are every bit as much for mirrorless as the original DN-marked lenses are.

Then...oh, duh. A number of the "new" DG-only lenses are more expensive. So do you suppose they put the lenses on the company web page farther away from each other to make it less likely that you'd compare the prices? Or does that sound like a TOP conspiracy theory? 

The ones that have gone up in price are the 17mm ƒ/4, 24mm ƒ/3.5, 24mm ƒ/2, 35mm ƒ/2, and 65mm ƒ/2. 

The ones that have stayed at the same price are the 20mm ƒ/2, 45mm ƒ/2.8, 50mm ƒ/2, and 90mm ƒ/2.8.

It appears that none of the Contemporary zoom lenses are yet available in a DG-only version. 

Should you be interested in snagging something at the old "DG DN" price, B&H Photo still has a couple of the DG DN marked lenses that look like they're based on the lower price: the 17mm ƒ/4 DG DN, L-mount, $599 (same as Sigma list price) and the 65mm ƒ/2 DG DN, L-mount, $599 ($100 less than the Sigma list price for the old one; the new one is $769). The others are discontinued at the former prices. The 65mm has particularly nice bokeh if you're all right with the only mildly longer angle of view.

All those prices are for L-mount. Sony E-mount lenses might be different prices. Some look to be more, some less.

I really like this lens series. They have all-metal casings and very smooth operation, and metal lens hoods, even, and their performance is beyond reproach, at least the two I've tried. I've been meaning to buy a 90mm. Now is probably the time. [UPDATE: too late.]

Mike

Original contents copyright 2025 by Michael C. Johnston and/or the bylined author. All Rights Reserved. Links in this post may be to our affiliates; sales through affiliate links may benefit this site. As an Amazon Associate I earn from qualifying purchases. (To see all the comments, click on the "Comments" link below or on the title of this post.)

Featured Comments from:

Jim Kofron (partial comment): "Sigma did announce a price increase due to the tariffs. I have a 90mm on backorder from B&H; I think it's supposed to come in September. I doubt that they will 'give it' to me for the original backorder price. The new I-series lenses were all getting the makeover (with magnetic caps, etc). I have a new 45mm and an older 17mm (both for my black Sigma BF). As for the Sigma BF, I'm really enjoying that camera. I've never had a Sigma that was so fast and rock-solid on autofocus—it's quite a treat!"

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