Sigma 28mm or 40mm f/1.4 DG HSM ART Lenses (Sony E-Mount) - $599 @ Adorama

No deal for EF mount?

How does these compare to stock lense for Alpha 7r IV?

Quote from ElatedSwing9273 : How does these compare to stock lense for Alpha 7r IV?

You're asking about the difference between a kit lens and a 1.4 prime? … I think you need a bit more experience before upgrading but i'll answer your question anyway. The prime is fixed focal length so no zooming in (use your feet to walk closer/farther from the subject) the 1.4 makes it do you can shoot with a lower ISO and or faster shutter speed in darker situations while also offering more blurred backgrounds.

Dumbbell len weight 2.64 pound.

Quote from ElatedSwing9273 : How does these compare to stock lense for Alpha 7r IV?

I own this lens. I use it to shoot Models in studio. For $599 for Sony it's a complete steal. This replaces a 50mm in use. This killed my 50mm art lens in all ways. This runs neck and neck with the quality from my Zeiss Milvus. For Nikon and Canon 799 is the best deal on a fantastic lens that you will ever get.

1. This is not a native mirrorless lens. "HSM" in the name means that it's an old repurposed design from the DSLR days. Do you see that big black collar on the bottom? That's essentially a built in converter. To get the latest and greatest, you need to hint for "DN" in the name.
2. What non-native means for you it that the autofocus might not be quite as on par with say Sony G or GM lenses and the size and weight are humongous.
3. All that aside, this is an extremely high quality lens and is a steal for the price. You cannot get better quality images at this price point. (applies to all Sigma Art lenses really)
4. Native Sigma mirrorless lenses (the DN ones) are easily double or sometimes even triple this price.
5. Sigma is likely putting things up for sale because they are rumored to introduce a line of native (DN) 50mm primes f1.2 and 1.4 this quarter.

This is the new norm price for these duo - superb sharpness at the cost of weight and relatively slow flocusing

Quote from modang : 1. This is not a native mirrorless lens. "HSM" in the name means that it's an old repurposed design from the DSLR days. Do you see that big black collar on the bottom? That's essentially a built in converter. To get the latest and greatest, you need to hint for "DN" in the name. 2. What non-native means for you it that the autofocus might not be quite as on par with say Sony G or GM lenses and the size and weight are humongous. 3. All that aside, this is an extremely high quality lens and is a steal for the price. You cannot get better quality images at this price point. (applies to all Sigma Art lenses really) 4. Native Sigma mirrorless lenses (the DN ones) are easily double or sometimes even triple this price. 5. Sigma is likely putting things up for sale because they are rumored to introduce a line of native (DN) 50mm primes f1.2 and 1.4 this quarter.

This exactly. Everyone should read this for an informed decision. Definitely waiting for them to properly design a lens that replaces this original lazy product launch.

Quote from modang : 1. This is not a native mirrorless lens. "HSM" in the name means that it's an old repurposed design from the DSLR days. Do you see that big black collar on the bottom? That's essentially a built in converter. To get the latest and greatest, you need to hint for "DN" in the name. 2. What non-native means for you it that the autofocus might not be quite as on par with say Sony G or GM lenses and the size and weight are humongous. 3. All that aside, this is an extremely high quality lens and is a steal for the price. You cannot get better quality images at this price point. (applies to all Sigma Art lenses really) 4. Native Sigma mirrorless lenses (the DN ones) are easily double or sometimes even triple this price. 5. Sigma is likely putting things up for sale because they are rumored to introduce a line of native (DN) 50mm primes f1.2 and 1.4 this quarter.

Regarding Point 4: DN lenses are not "easily double or sometimes even triple this price." They list for the same price, and the "Contemporary" and "I"series of DN lenses are actually much cheaper (although they have smaller max apertures). You can check the Sigma page for their DG/DN lenses:

https://www.sigmaphoto.com/lenses/dg-dn
https://www.sigmaphoto.com/lenses/i-series

Regarding Points 1&2) What "big black collar on the bottom" are you referring to? The dimensions of both HSM and DN lenses are similar. If anything, if you compare the 35/1.4 HSM and DN lenses (which is available in both) you will find both similar in size, though the Sony-E lenses are longer than the DSLR version of the HSM lenses.

EDIT: regarding the "collar": the collar refers to the different shape between the DSLR version of these lenses (for Canon EF, Nikon F) compared to the Sony-E, mirrorless version, which has a shorter flange distance. Here is a link to a discussion regarding the extra length of these HSM lenses in E-Mount compared to HSM lenses in other mounts:
https://www.dpreview.com/forums/thread/4531028

As for size and weight: the HSM lens weighs 23.5 oz while the DN lens weighs 22.6 oz. Also the dimensions of the HSM 35/1.4 lens is actually smaller (3in x 3.7in) than the equivalent 35/1.2 DN lens (3.0 in. x 4.4 in.) [EDIT: This should be 35/1.4 DN lens--not f/1.2]. For the 14-24/2.8 lenses: the HSM is significantly heavier (40%) than the DN, though, dimensions are close.

All that being said, all the ART series lenses tend to be very big and heavy, but extremely high quality lenses at competitive prices compared to the best lenses by other manufacturers.

Quote from mike93704 : Regarding Point 4: DN lenses are not "easily double or sometimes even triple this price." They list for the same price, and the "Contemporary" and "I"series of DN lenses are actually much cheaper (although they have smaller max apertures). You can check the Sigma page for their DG/DN lenses: https://www.sigmaphoto.com/lenses/dg-dn https://www.sigmaphoto.com/lenses/i-series Regarding Points 1&2) What "big black collar on the bottom" are you referring to? The dimensions of both HSM and DN lenses are similar. If anything, if you compare the 35/1.4 HSM and DN lenses (which is available in both) you will find both similar in size, though the Sony-E lenses are longer than the DSLR version of the HSM lenses. EDIT: regarding the "collar": the collar refers to the different shape between the DSLR version of these lenses (for Canon EF, Nikon F) compared to the Sony-E, mirrorless version, which has a shorter flange distance. Here is a link to a discussion regarding the extra length of these HSM lenses in E-Mount compared to HSM lenses in other mounts: https://www.dpreview.com/forums/thread/4531028 As for size and weight: the HSM lens weighs 23.5 oz while the DN lens weighs 22.6 oz. Also the dimensions of the HSM 35/1.4 lens is actually smaller (3in x 3.7in) than the equivalent 35/1.2 DN lens (3.0 in. x 4.4 in.). For the 14-24/2.8 lenses: the HSM is significantly heavier (40%) than the DN, though, dimensions are close. All that being said, all the ART series lenses tend to be very big and heavy, but extremely high quality lenses at competitive prices compared to the best lenses by other manufacturers.

So are you saying I won't regret this purchase for the 40mm?

They're still trying to dump these? These were on sale for 50% off last month. New line is dropping so they're clearing these out.

Quote from Eragorn : So are you saying I won't regret this purchase for the 40mm?

EVERYONE is impressed with the optical quality of this lens. But, whether it is a good lens for you depends on many factors: what camera you are using (are you using a Sony that will really show the difference that this very good, but heavy lens has?) or will you be upgrading to another Sony e-mount camera that can? What lenses do you have now and what are you likely to use this single focal length lens for?

As others have pointed out, this lens weighs over 2.5 lbs, or about a pound heavier than an A7 series full frame camera and 3x the weight of an a6x00 series APS-C camera. It may not be the best lens for everyday shooting unless you are comfortable with lugging it around. For studio, still life, landscape, and other situations where you are less likely to be carrying it around all day, it'll be great.

One big advantage of using this lens on a Sony is to take advantage of the in-body stabilization since the Sigma lens does not have its own optical stabilization.

Quote from mike93704 : EVERYONE is impressed with the optical quality of this lens. But, whether it is a good lens for you depends on many factors: what camera you are using (are you using a Sony that will really show the difference that this very good, but heavy lens has?) or will you be upgrading to another Sony e-mount camera that can? What lenses do you have now and what are you likely to use this single focal length lens for? One big advantage of using this lens on a Sony is too take advantage of the in-body stabilization since the Sigma lens does not have its own optical stabilization.

Camera is an A7III

Quote from Eragorn : Camera is an A7III

If you want a f/1.4 wide to normal lens, this Sigma 40/1.4 is a great deal for $600: giving comparable, if not superior optical quality to Sony's 35/1.4, 50/1.4, but for much less than Sony's $1400/$1500 prices.

EDIT: spend $59 and get the USB dock to use with this lens