Hi! I Just bought my first camera - a Canon SL3. I want to mainly do vlogs/stream and I`m looking for a len that doesnt get very cropped because of the sensor. For example: I tried a 50mm but couldn't use, because the "crop/zoom" was very high (like 80mm I think). I read that a 24mm is equals to 38mm on a APS-C Sensor - Also cant use. Then I almost bought a 10-18mm - If I understood right, it doesnt get cropped on APS-C sensor. The 10-18mm still 10-18mm. BUT it is too dark for me (aperture starting at 4.5). SO my question is: What len could I use that: - Doesn't get cropped on APS-C Sensor - And has a bright aperture (I believe starting at 2.something would be great) Thank you!
Hi Joselito 1. Firstly let us get one thing right, it is "lens" not "len". 2. The focal length of the lens doesn't change because you are using a smaller (cropped) sensor, so a 10-18 lens will still be 10-18 whether you use it on a full frame or a cropped sensor. In effect on a cropped sensor it equates to a 16-32 when used on a full frame camera. So the field of view of all lenses will be less on a cropped sensor by a factor of 0.625 (or 1.6 if you are working backwards). 3. The only Canon lens that fits your requirements is the EF 14mm f2.8 L but this will cost about 4 times more than you paid for your camera and would give you the field of view similar to a 22mm on a a full frame when used on your SL3. Like all DSLR cameras your SL3 is basically a still camera with limited video capabilities added on. For vlogging and streaming you would be better off getting a proper video camera of even a webcam. Of course the other options are use the 10-18 and provide more light on the subject or use a longer lens and move further away. Good luck Ray
I'll try to explain from the camera perspective in case that helps instead for from lens side. Your camera is has a cropped sensor as it is APS-C, that means it is ~~2/3 the size of full frame and will record a smaller image with the same exact lens vs a FF camera. The image will have the same magnification like Ray mentioned, just appear cropped because of the camera's sensor size. You can buy lenses sized specifically to the camera body, EF-S lenses are made for APS-C and only will work on those cameras, regular EF lenses will work on either body making them a more future proof investment. The 10-18 is a good idea for vlogs since it has IS for you if your out on the go. The difference between 2.8 and 4.5 is a little more than 1 stop of light, and while nice to have should be something you can compensate for elsewhere. Also if your using any shallower than 2.8 as a aperture you will have very little depth of field to work with.
Hi, Ray. Thanks for your reply, correction on my english and all the tips. I think I understand better now. All the lenses I saw on canon webpage (from my country) shows something like: EF-S 24mm Focal Distance (APS-C): 38mm Focal Distance (Full Frame): 24mm So in order to have an idea of how the lens would look like I just set my lens from the kit to that focal distance for APS-C. Unfortunatelly I can't increase the distance between me and the camera, so my only choice would be increase the light. That is something I was trying to avoid, but I can do that. Thank you! Hey, Johnsey. Thanks for the reply and for the explanation. Would you say that the 10-18 is a considerable upgrade from the lens kit 18-55?
Have you increased the ISO to compensate for shooting indoors in lower light? That would get you a better exposure without light, but would possibly add some digital noise.Not sure how familiar you are with the exposure triangle but shutter, aperture and ISO all can be adjusted. Think of it as A+B+C = Current light ... So if the image is dark cant adjust (a) down to 4 because its the lowest f stop you have, then you need to bump up b or c ,..a longer shutter or higher iso to compensate. Now the 10-18 i would consider a very solid purchase for your needs, because it is actually performs well optically and you wanted to go wider angle. Upgrade may not be a perfect word, since they do not have the same range of zoom its hard to say one replaces the other, but if you want to go quite wide the 10-18 does that. For vlogging it will be a considerable upgrade based on your needs. The18-55 is an "ok" lens, they have a handful of versions of that lens so i am not sure exactly which one you have but they are generally not the sharpest lens and have distortion issues at the wide 18mm end of the zoom. I am sure you will find reasons to use the lens when you want focal ranges in the middle of this zoom. Here is the thing, anything faster than 4.0 gets speedy very quickly. And you seemed to also really want to shoot wider. And if you are stationary seems you wanted a zoom to make adjustments rather than trying to find 1 single fixed focal length. Thus the suggestion. There really aren't faster zooms that wide, or example canon makes a 24-70 2.8 but it cost 3x what your camera did. If your indoors, its not hard to get some LED light panels and maybe a diffuser panel or 2 and increase the ambient light in the room while not making it harsh lighting.
No, the 38mm you have mention above is not a real value it only refers to the the equivalent view compared to a full frame. All lenses whether EF or EFs are marked in actual focal length so you should set your lens to 24mm. I realise this is confusing especially for someone like yourself who is just starting in photography but it will all make sense eventually. Ray
