andrewgray Posted November 12, 2018 Share Posted November 12, 2018 What's the equivalent sensor size of the EOS R in 4K crop mode? How does this compare to super 35mm film and the Canon C series? Quote Link to comment Share on other sites More sharing options...
Timotheus Posted November 12, 2018 Share Posted November 12, 2018 Andrew had a nice rant about this. https://www.eoshd.com/2018/09/dishonest-misleading-unnecessary-eos-r-and-cropped-4k/ In short, it´s a smaller effective sensor size than APS-c/Super 35, almost getting at micro four thirds levels... (With crop-glass like Sigma 18-35 and 30mm F1.4 you can compensate somewhat). Quote Link to comment Share on other sites More sharing options...
andrewgray Posted November 12, 2018 Author Share Posted November 12, 2018 If the sensor is 36mm wide and there's a 1.75 crop on 4K doesn't that make it a 21mm wide chip which is only about 12 percent smaller than a super 35mm chip. Am I missing something? Quote Link to comment Share on other sites More sharing options...
androidlad Posted November 12, 2018 Share Posted November 12, 2018 1 hour ago, andrewgray said: If the sensor is 36mm wide and there's a 1.75 crop on 4K doesn't that make it a 21mm wide chip which is only about 12 percent smaller than a super 35mm chip. Am I missing something? You're correct. The cropped area is between APS-C and M4/3. Quote Link to comment Share on other sites More sharing options...
webrunner5 Posted November 12, 2018 Share Posted November 12, 2018 2 hours ago, andrewgray said: If the sensor is 36mm wide and there's a 1.75 crop on 4K doesn't that make it a 21mm wide chip which is only about 12 percent smaller than a super 35mm chip. Am I missing something? Yeah but a m4/3 Sensor in say the PK4 is 18 mm × 13.5 mm. So it is not like the crop is too far away from it either. s35 is 23.5 × 15.7 mm. It is closer to m4/3 for what most people will shoot 4K in. It really is 1.8 for UHD, 1.74 for DCI so it is more like 20mm at times. Either way it pretty much sucks. But it is what it is. If you have a bag of Canon lenses, hopefully some EF-S ones, well you are going to buy it like it or not. So if you sort of want to match your Canon APSC footage best to shoot in DCI. Found this chart. First I ever saw listing a PK4. Arri 65mm is...well it is Huge! http://www.studiodaily.com/2018/07/download-phil-hollands-digital-film-sensor-chart/ Quote Link to comment Share on other sites More sharing options...
FreshGiant Posted November 12, 2018 Share Posted November 12, 2018 Is a focal reducer technically possible? There would be a lot of demand for one if you could get the crop back closer to FF and still have working EF electronics/auto focus. Quote Link to comment Share on other sites More sharing options...
Super Members Mattias Burling Posted November 12, 2018 Super Members Share Posted November 12, 2018 1 hour ago, FreshGiant said: Is a focal reducer technically possible? There would be a lot of demand for one if you could get the crop back closer to FF and still have working EF electronics/auto focus. Its not only possible its already been done on Sony and Fuji. And I have confirmation several different focal reducers are in the making for the EOS-R as well as the Z6/7 :) Quote Link to comment Share on other sites More sharing options...
androidlad Posted November 12, 2018 Share Posted November 12, 2018 17 minutes ago, Mattias Burling said: Its not only possible its already been done on Sony and Fuji. And I have confirmation several different focal reducers are in the making for the EOS-R as well as the Z6/7 Z6 has no crop in 4K, so I assume such focal reducers are meant to use with medium format lenses? If focal reducers only work in crop mode for video and have to be removed for stills I doubt they are commercially viable. Quote Link to comment Share on other sites More sharing options...
Super Members Mattias Burling Posted November 12, 2018 Super Members Share Posted November 12, 2018 2 minutes ago, androidlad said: Z6 has no crop in 4K, so I assume such focal reducers are meant to use with medium format lenses? If focal reducers only work in crop mode for video and have to be removed for stills I doubt they are commercially viable. Well. there are plenty of speed boosters for as small sensors as the m4/3, BMPCC s16 all the way down to Pentax Q. So Im sure they will sell just fine. Quote Link to comment Share on other sites More sharing options...
androidlad Posted November 12, 2018 Share Posted November 12, 2018 13 minutes ago, Mattias Burling said: Well. there are plenty of speed boosters for as small sensors as the m4/3, BMPCC s16 all the way down to Pentax Q. So Im sure they will sell just fine. But those cover the whole sensor. For speedboosters to cover FF sensor, medium format lenses is the only way to go.Insert other media Quote Link to comment Share on other sites More sharing options...
FreshGiant Posted November 12, 2018 Share Posted November 12, 2018 I know Kipon does sell a medium format to Sony E mount focal reducer. So maybe they could make one for Nikon as well. There is a EF to Eos R adapter but Canon doesn't put any glass in there because obviously because it would cause photos to vignette. But if some other company can get that out and get the crop close to full frame AND keep the auto focus working, then I think the EOS R becomes much more interesting for video work. Quote Link to comment Share on other sites More sharing options...
mercer Posted November 12, 2018 Share Posted November 12, 2018 24 minutes ago, androidlad said: But those cover the whole sensor. For speedboosters to cover FF sensor, medium format lenses is the only way to go.Insert other media Well, some FF cameras have a better crop mode than FF mode in video, so one could shoot in crop mode and then gain back the FF FOV and an extra stop by using a speedbooster. webrunner5 1 Quote Link to comment Share on other sites More sharing options...
androidlad Posted November 12, 2018 Share Posted November 12, 2018 5 minutes ago, mercer said: Well, some FF cameras have a better crop mode than FF mode in video, so one could shoot in crop mode and then gain back the FF FOV and an extra stop by using a speedbooster. Yes that's true. From a business standpoint, developing a speedbooster that only works in video doesn't seem viable. Quote Link to comment Share on other sites More sharing options...
webrunner5 Posted November 12, 2018 Share Posted November 12, 2018 1 hour ago, mercer said: Well, some FF cameras have a better crop mode than FF mode in video, so one could shoot in crop mode and then gain back the FF FOV and an extra stop by using a speedbooster. Yeah and by doing that you help with Rolling Shutter when you are back into FF also. Quote Link to comment Share on other sites More sharing options...
Super Members Mattias Burling Posted November 12, 2018 Super Members Share Posted November 12, 2018 1 hour ago, androidlad said: Yes that's true. From a business standpoint, developing a speedbooster that only works in video doesn't seem viable. They where popular for Sony. Quote Link to comment Share on other sites More sharing options...
androidlad Posted November 12, 2018 Share Posted November 12, 2018 2 minutes ago, Mattias Burling said: They where popular for Sony. Because Sony use E mount for both FF and APS-C stills/cinema cameras. A7RII/III have great quality S35 crop mode for video (and stills), but I rarely see people use speedbooster on them. Quote Link to comment Share on other sites More sharing options...
webrunner5 Posted November 12, 2018 Share Posted November 12, 2018 54 minutes ago, androidlad said: Because Sony use E mount for both FF and APS-C stills/cinema cameras. A7RII/III have great quality S35 crop mode for video (and stills), but I rarely see people use speedbooster on them. It was a trick on the original A7s also, They are Terrible for rolling shutter. Quote Link to comment Share on other sites More sharing options...
maxmizer Posted November 13, 2018 Share Posted November 13, 2018 20 hours ago, androidlad said: Because Sony use E mount for both FF and APS-C stills/cinema cameras. A7RII/III have great quality S35 crop mode for video (and stills), but I rarely see people use speedbooster on them. I confirm I have a7RII various lenses, practically almost all adapters, but no speed booster ... Maybe, but I'm thinking about a M42 ... ? Quote Link to comment Share on other sites More sharing options...
Super Members Mattias Burling Posted November 13, 2018 Super Members Share Posted November 13, 2018 On 11/12/2018 at 11:15 PM, androidlad said: Because Sony use E mount for both FF and APS-C stills/cinema cameras. A7RII/III have great quality S35 crop mode for video (and stills), but I rarely see people use speedbooster on them. To clarify once again, the Metabones Speedbooster for Sony E-Mount was popular, used by many and recommended by several reviewers to be used on the Full frame A7x. We are talking about niche stuff here. Most that uses an adapter and definitely speed boosters are a minority of camera nerds. You can't apply what the general public like to stuff like speed boosters. Because they don't buy it anyway. Metabones entire business idea is to cater to camera nerds like us that are willing to jump through all kinds of hoops. 3 hours ago, maxmizer said: I confirm I have a7RII various lenses, practically almost all adapters, but no speed booster ... Maybe, but I'm thinking about a M42 ... ? I can confirm the opposite maxmizer 1 Quote Link to comment Share on other sites More sharing options...
maxmizer Posted November 14, 2018 Share Posted November 14, 2018 22 hours ago, Mattias Burling said: I can confirm the opposite But you are a special case ? to no count...? Quote Link to comment Share on other sites More sharing options...
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