https://community.usa.canon.com/t5/Gear-Guide/Sigma-18-50mm-f-2-8-compared-to-Canon-24-70-f-2-8/m-p/575080#M2665 <P>Greetings ,</P> <P>I think the first question I:d like to ask is what camera you intend to pair the Sigma lens with?</P> <P>These lenses are indeed in different leagues. The Sigma 18-50 f2.8 for Canon RF is an aps-c lens.&nbsp; If you use it on a full frame body, example 24 megapixels the capture resolution of your images is going to be 9.3 megapixels.&nbsp; Depends on what you're going to do with the output but it's not usually something I might recommend.</P> <P>Video content would not be much different, it would still be capturing at a much lower resolution that your camera might be capable of.</P> <P>The Sigma lens also doesn't have image stabilization.&nbsp; For video, this might be a nice to have feature.&nbsp; There is also a difference in optics quality between the two.&nbsp; There's a reason why the Canon lens is 4x.the price <span class="lia-unicode-emoji" title=":slightly_smiling_face:">🙂</span></P> <P>The focal length of the Sigma lens is not going to change If used on a full-frame body, but it's field of view will.&nbsp; The images and video you capture will use a much smaller portion of the sensor.&nbsp; While I wouldn't recommend the Sigma lens for full frame, it could work if you're okay with the capture resolution.&nbsp; Again, however, my advice would be no.</P> <P>I am a proponent of Sigma lenses.&nbsp; I used them for many years prior to upgrading to mirrorless.&nbsp;&nbsp;</P> <P>These two lenses are on dramatically different spectrums from one another.&nbsp; Each has its merits depending on the intended use.</P> Fri, 14 Nov 2025 13:20:58 GMT shadowsports 2025-11-14T13:20:58Z https://community.usa.canon.com/t5/Gear-Guide/Sigma-18-50mm-f-2-8-compared-to-Canon-24-70-f-2-8/m-p/575057#M2664 <P>Yes, 100% understand the Canon lens is probably way better in build quality and made for a full frame body, but seeing the price of the Sigma lens I was wondering how much this lens could be an affordable replacement for the popular but super expensive Canon lens.</P><P>If I'm correct, the Sigma 18-50 will be around a 29-80mm lens on a full frame, making it a lens in the same range as the Canon 24-70.</P><P>Since I do a lt of street interview content, currently with a Canon 24-105 f/4.0, this feels like an interesting investment.</P> Fri, 14 Nov 2025 05:54:19 GMT https://community.usa.canon.com/t5/Gear-Guide/Sigma-18-50mm-f-2-8-compared-to-Canon-24-70-f-2-8/m-p/575057#M2664 hanika 2025-11-14T05:54:19Z https://community.usa.canon.com/t5/Gear-Guide/Sigma-18-50mm-f-2-8-compared-to-Canon-24-70-f-2-8/m-p/575080#M2665 <P>Greetings ,</P> <P>I think the first question I:d like to ask is what camera you intend to pair the Sigma lens with?</P> <P>These lenses are indeed in different leagues. The Sigma 18-50 f2.8 for Canon RF is an aps-c lens.&nbsp; If you use it on a full frame body, example 24 megapixels the capture resolution of your images is going to be 9.3 megapixels.&nbsp; Depends on what you're going to do with the output but it's not usually something I might recommend.</P> <P>Video content would not be much different, it would still be capturing at a much lower resolution that your camera might be capable of.</P> <P>The Sigma lens also doesn't have image stabilization.&nbsp; For video, this might be a nice to have feature.&nbsp; There is also a difference in optics quality between the two.&nbsp; There's a reason why the Canon lens is 4x.the price <span class="lia-unicode-emoji" title=":slightly_smiling_face:">🙂</span></P> <P>The focal length of the Sigma lens is not going to change If used on a full-frame body, but it's field of view will.&nbsp; The images and video you capture will use a much smaller portion of the sensor.&nbsp; While I wouldn't recommend the Sigma lens for full frame, it could work if you're okay with the capture resolution.&nbsp; Again, however, my advice would be no.</P> <P>I am a proponent of Sigma lenses.&nbsp; I used them for many years prior to upgrading to mirrorless.&nbsp;&nbsp;</P> <P>These two lenses are on dramatically different spectrums from one another.&nbsp; Each has its merits depending on the intended use.</P> Fri, 14 Nov 2025 13:20:58 GMT https://community.usa.canon.com/t5/Gear-Guide/Sigma-18-50mm-f-2-8-compared-to-Canon-24-70-f-2-8/m-p/575080#M2665 shadowsports 2025-11-14T13:20:58Z