topic Re: I Have What May Be A Stupid Question. EF, RF, EF-S, RF-S in EF & RF Lenses

I Have What May Be A Stupid Question. EF, RF, EF-S, RF-S

Far-Out-Dude — Sun, 01 Dec 2024 06:46:29 GMT

I have what some may find to be a stupid question, but what exactly is aWispy Clouds. S lens? (EF-S, RF-S) What is different about them and in what circumstance would I want one over a EF or RF lens? Thank you very much for your time.

Re: I Have What May Be A Stupid Question. EF, RF, EF-S, RF-S

AtticusLake — Sun, 01 Dec 2024 08:23:29 GMT

Canon use the "-S" suffix to indicate a lens or camera which is designed for a so-called "crop" sensor, also called APS-C, roughly equivalent to Super 35. As opposed to "full-frame", which has a larger sensor.

So a "-S" camera will have a sensor about 23mm × 15mm. A "-S" lens will create an image big enough to cover that sensor, so it will work fine. A full-frame lens -- i.e. no "-S" -- will create a larger image, which will also be fine.

A full-frame camera -- i.e. no "-S" -- will have a sensor about 36mm × 24mm -- quite a bit larger. A full-frame lens will cover this no problem, but a "-S" lens will not. The camera will handle a "-S" lens by reading out only a part of the sensor ("crop mode"), which will give you a drastically reduced resolution. Your pictures will be OK, but with nowhere near the resolution you paid for.

The benefit of a "-S" lens on a "-S" camera is that it will, in general, be smaller, lighter, and cheaper than a full-frame lens; the drawback is that if you later upgrade your camera to full-frame, then the "-S" lenses won't work well.

A "-S" camera, or a full-frame camera in crop mode, will also have a narrower field of view; so your lenses will all be a bit more telephoto. Multiply the focal length by around 1.5 to get the "equivalent full-frame focal length". So a 100mm lens on a "-S" camera is still a 100mm lens, but will give you the field of view that a 150mm lens would give you on a full-frame camera.

If you want to know more about lens mounts, I wrote an article which tries to explain this stuff: https://moonblink.info/MudLake/gear/lenses

Hope this helps.

Re: I Have What May Be A Stupid Question. EF, RF, EF-S, RF-S

p4pictures — Sun, 01 Dec 2024 09:03:42 GMT

When Canon introduced the first EF-S lenses with the EOS 300D / Digital Rebel they used S to signify short back focus design. This is because the EF-S design allowed the rear elements of the lens to be located deeper in to the mirror box of DSLR cameras. These cameras with smaller APS-C size sensors also had a smaller mirror so there was not the need for so much clearance behind the rear of the lens when the mirror raised to take a photo. Using short back focus design allowed the lenses to be smaller and lighter to make, wile also keeping the price reasonable.

With mirrorless cameras there is no mirror to contend with and lenses mount much closer to the sensor anyway thanks to the shorter flange distance. The RF-S designation is used to continue the notion of "S" lenses being designed for mirrorless cameras with an APS-C size sensor.

Re: I Have What May Be A Stupid Question. EF, RF, EF-S, RF-S

Far-Out-Dude — Sun, 01 Dec 2024 10:48:01 GMT

Thank you both very much. I see no reason to look at a RF-S for my new R5 Mark ii then. Thank you both for keeping me from wasting money. May if I chose to buy more lenses for my M50 look at one though. I still want a 32mm for that camera but have not found one that is new as they discontinued them. I think I was looking at a 24mm EF-S for that camera at one time but after seeing the results of the 22mm Prime I have no interest in that as I was very disappointed in that lens for that camera. I still want that 32mm though for it.

@AtticusLake I will check that out later, thank you.

Re: I Have What May Be A Stupid Question. EF, RF, EF-S, RF-S

AtticusLake — Sun, 01 Dec 2024 10:58:08 GMT

@Far-Out-Dude wrote:

Thank you both very much. I see no reason to look at a RF-S for my new R5 Mark ii then. Thank you both for keeping me from wasting money. May if I chose to buy more lenses for my M50 look at one though.

RF-S and RF lenses will not work on an M-series camera. EF-S and EF-M lenses will (EF-S will need an adapter). But the M series is a bit dead, really, nor worth making a big investment in at this point.

The article I posted the link to explains the compatibility issues for M series.

Re: I Have What May Be A Stupid Question. EF, RF, EF-S, RF-S

ebiggs1 — Sun, 01 Dec 2024 15:25:19 GMT

Remember in Photoshop less is more. Back off on the sliders.

Re: I Have What May Be A Stupid Question. EF, RF, EF-S, RF-S

Far-Out-Dude — Mon, 02 Dec 2024 02:12:41 GMT

Would you like to offer more detail? This is the original in Jpeg form. The was not much done with it other than bring out the sky a tad and adding shadows to add depth.

Re: I Have What May Be A Stupid Question. EF, RF, EF-S, RF-S

Tintype_18 — Mon, 02 Dec 2024 14:42:37 GMT

Interesting and like the landscape photo.

The only stupid question is the one not asked- Dad.

Re: I Have What May Be A Stupid Question. EF, RF, EF-S, RF-S

ebiggs1 — Mon, 02 Dec 2024 15:29:03 GMT

Better judgement and my gut feeling tells me it may be better to refrain from further critique because it is all in what you want in your photos and not what me or anyone else.If you like it as is, then I do too.

Re: I Have What May Be A Stupid Question. EF, RF, EF-S, RF-S

Far-Out-Dude — Tue, 03 Dec 2024 04:03:48 GMT

That's alright. The funny thing is I went and looked at the sliders and they were barely moved. Oh and it was in Lr I can't see stuff well in Photoshop so I don't use it much.

Re: I Have What May Be A Stupid Question. EF, RF, EF-S, RF-S

ebiggs1 — Tue, 03 Dec 2024 19:20:27 GMT

OK, I will step in to it one bit further. Canon cameras at least some or most of them have a Picture Style setting.. My recommendation is to set it to "Standard". Again it's not for me to to say if you get what please you that's all that is important.

"I can't see stuff well in Photoshop so I don't use it much."

Hmm surprising because PS and LR have the exact same settings possible. Your best friend in PS is Curves or Levels. Curves is a bit more capable then Levels. Keep shooting.

Re: I Have What May Be A Stupid Question. EF, RF, EF-S, RF-S

Far-Out-Dude — Sun, 15 Dec 2024 08:07:51 GMT

Thank you very much. I THINK I keep it mostly at landscape, I am getting pretty tired though and may have that wrong. If I am even thinking of the right thing, I know it says standard, just am to tired to remember where at this time. I never knew you replied by the way, very sorry about that.

Re: I Have What May Be A Stupid Question. EF, RF, EF-S, RF-S

Far-Out-Dude — Sun, 15 Dec 2024 08:08:41 GMT

Dad was a wise man. Thank you.

Re: I Have What May Be A Stupid Question. EF, RF, EF-S, RF-S

LeeP — Thu, 19 Dec 2024 19:25:14 GMT

People all too often don't want to hear critique--even if they ask for it--but where I lose patience is when someone represents something as garish as a Thomas Kinkade painting as an image SOOC.

As a working photographer with 45 years of experience in the field, for my own creations I really like grain/noise, so I shoot to get it. If I display a result in a group, I preface the commentary with what I was going for, but that never stops the know-betters from chiming in anyway.

Re: I Have What May Be A Stupid Question. EF, RF, EF-S, RF-S

Far-Out-Dude — Fri, 20 Dec 2024 02:24:39 GMT

Just wanted to let you know that yes we were speaking of the same thing and I have been keeping it at landscape. I have switched it to standard for now and will see if I like it more. Thank you for the advise.

Re: I Have What May Be A Stupid Question. EF, RF, EF-S, RF-S

ebiggs1 — Fri, 20 Dec 2024 15:43:46 GMT

Like LeeP stated it is and does come down to what you as the photographer want and like. It is not my place to say different. I used to sell my work, I am retired now, so I tried to do what other people like and want. It's a different mind set. Please ignore my comment and do as you like and suits your taste.

Re: I Have What May Be A Stupid Question. EF, RF, EF-S, RF-S

Far-Out-Dude — Fri, 20 Dec 2024 18:07:39 GMT

I understand what you mean in part about what other people like, I like taking pictures of waterfalls but I do not like that ribbon effect very often, I think it looks fake and like it is overdone to an extreme amount, I prefer to show the power in the falls like in this shot. Not my best but it shows what I mean. I do not mind a ribbon on a weaker falls like this.