Thanks, Bill. Will do. I've moved three relatives within the last two weeks. My daughter and her dogs have taken over my basement studio (bedroom) and we have two+ homes worth of furniture here so it has been an interruption to my regular routine of posting work and I have yet to get started on the addition of your collection of specimens.

Your mentoring and sharing your vast knowledge has helped me more that I could ever express. I'm processing a side view now of the ground beetle that I posted its face view of and I'll have it for you in a post in an hour or so. I'll also do a full body view of this one as well.

You probably mean a Canon M5 or M50. There's no such thing as an "M 5D".

There are "5D", full frame DSLRs... but if you are looking at getting the camera with 15-45mm lens, it has to be one of the crop sensor (APS-C) M-series mirrorless (there is no Canon 15-45mm lens for any of the DSLRs... they're typically sold with an 18-55mm or a more premium 18-135mm).

I recently got an M5 and really like it. Yes, it is a mirrorless camera (as are the M50, M6 Mark II and M100 models that Canon currently offers).

DO NOT get the EF-S 18-200mm lens. That lens is for the DSLRs and while it's possible to adapt it for use on the M-series mirrorless, there are better options.

There is a Tamron 18-200mm Di III VC lens available for use on Canon M-series. But I would try to steer you away from that, too. There is a less expensive, and likely better option.

The EF-M 15-45mm lens that typically comes with the camera serves as a "mildly wide to very short telephoto" zoom. If you want a more powerful telephoto, why not get the EF-M 55-200mm. It's smaller, lighter, less expensive than the Tamron 18-200mm. It might even offer better image quality. I found some reviews of the Tamron 18-200mm Di III... But none gave any standardized image quality tests. Unfortunately the site where I usually compare image quality test shots hasn't done a series with it. They have tested the older Tamron 18-200mm for DSLRs, which wasn't particularly good. The Canon EF-M 55-200mm has noticeably better image quality at all the focal lengths they share. But the newer Tamron 18-200mm III might use different optical formula and be improved... I don't know. But that sort of very broad ranging zoom usually compromises in a lot of ways. A less extreme zoom like the 55-200mm is likely to have much better image quality.

The Canon EF-M 55-200mm IS STM lens sells for $349.

The Tamron 18-200mm Di III VC zoom sells for $499.

Yes, you can get an adapter that allows Canon FD lenses to be used on the M-series cameras. They will be manual focus AND fully manual aperture ONLY. Look for an "FD to EF-M" adapter.

As you stop the lens down, the viewfinder will dim down along with it (the adapted lens is not maintained open until the moment of exposure, the way modern lenses are). This is okay because the electronic viewfinder of the M5 gives you "exposure preview" and will allow you to see to focus. It also has "focus peaking", where objects that are in focus are outlined in a color to help with manual focus (you can choose yellow, red or blue.... and can change it for different situations... I use yellow most of the time).

You can use the camera in fully Manual exposure mode with adapted lenses. You also can get auto exposure using Aperture Priority (Av) mode. In that mode you choose the ISO, select the aperture and the camera determines what shutter speed to use, based upon it's metering system. (The M5 has an Exposure Compensation dial on the top right, that you'll want to learn to use with auto exposure modes.) It also is possible to get auto exposure setting the camera to M (manual) and enabling Auto ISO (simply dial the ISO setting all the way down past 100, until "A" appears). Even though it's Manual, once Auto ISO is enabled it becomes an AE mode, too. And this also works with adapted vintage lenses. In M + Auto ISO mode, you select both the aperture and the shutter speed, while the camera choose what ISO to use, based upon it's metering system.

With adapted manual aperture lenses you CANNOT use Shutter Priority AE (Tv), Program (P), full "Auto" or any of the "Scene" modes ("sports", "scenic", "portrait", etc.)

IMPORTANT: To use an adapted manual aperture lens on the camera, you MUST go into the menu and set the camera to "shoot without lens". By default the camera won't want to release the shutter when it doesn't detect an electronically controlled lens installed. The adapted lenses (as well as some modern manual focus/manual aperture lenses) aren't "recognized" by the camera. But they work just fine once you make this setting.

Your EF-M lenses such as the 15-45mm and 55-200mm will be usable in all the exposure modes, recognized by the camera and you will use the dials and buttons on the camera to change settings. Auto focus will also work, of course. (You should read up on the camera's AF settings. For example, you can set it up so that moving your finger on the rear LCD screen will change the selected AF point. To keep your nose from changing the selection, you can restrict this to one quadrant of the LCD screen... I'd recommend the upper right since that falls right under your thumb while you are holding the camera with your eye in the viewfinder.)

You're likely to want at least one spare battery. The electronic viewfinder is a neat feature, but it draws a lot of power, so you don't get many shots per charge. The LP-E17 battery isn't cheap, but no one makes them other than Canon. So there's no real alternative. They work well and can be recharged hundreds of times, so it's almost a one-time purchase.

You also will need some SD memory cards. I recommend good quality 16GB or 32 GB. There are larger cards available, but using one of those is like putting all your eggs in one basket. If the card fails (rarely happens) or you lose it (happens more often)... or you forget and leave it in a pocket of a pair of jeans that get laundered (happens, but usually doesn't damage the card)... it can be a real disaster if you have a really big card with many days or weeks worth of images on it! That's why I carry four to six smaller memory cards per camera, rather than a single really big one in each. I shoot RAW (larger file sizes) with M5 and get close to 900 images on a 32GB memory card. JPEGs would get even more per card.

The two lenses you're considering will be great to start with. Later you might want others... just don't add too many too fast. Have some fun adapting your vintage lenses, too. BTW, because the M5 is an APS-C "crop" camera, your vintage lenses will "act longer" than you remember. For example, a 50mm will be a "short telephoto" instead of a "normal" lens. A wide lens will no longer be very wide.... A 21mm will "act like" a much less wide 35mm lens (approx.). But telephotos will be "more powerful".... A 200mm will "act like a 320mm" did on your film camera.

If you ever want a wider lens, check out the Canon EF-M 11 -22mm. It's a great lens! It's the sharpest of any of the ultrawide zooms Canon makes for crop sensor cameras (which is saying a lot, because the EF-S 10-18mm and EF-S 10-22mm for the DSLRs are among the best anyone makes).

There aren't a whole lot of EF-M lenses anyway. Canon currently offers 7 or 8 of them. Sigma just introduced a 16mm (wide), 30mm (normal) and 56mm (short telephoto) that are among the first from a 3rd party manufacturer with autofocus that appear to be excellent. Tamron just makes the one lens (18-200mm). There are a bunch of manual focus only... and a HUGE selection of vintage lenses that can easily be adapter and used as described above.

So far I've been working with four manual focus/manual aperture lenses....

12mm f/2.8 Meike
21mm f/2.0 Rokinon
50mm f/1.1 Kanlan
90mm f/2.5 Tamron (vintage, macro)

I may add the 11-22mm and some other autofocus lenses in the future (I had forgotten how HARD it is to manually focus ).

EDIT: I just saw your followup that you have a couple older Canon DSLRs. The crop of the M5 will be the same as those, but the newer M5 has much higher resolution sensor. Also, any lenses you have for those cameras probably can be adapted for use on the M5. Canon themselves make an EF/EF-S to EF-M adapter, but there good 3rd party manufactured available for a lot less $. I said "probably" above because while all Canon EF or EF-S lenses will adapt and work fine... Not all older model 3rd party lenses work properly when adapted. Most are fine. But some won't focus or have other "glitches".

Good luck with your purchase!

Am about to pick up a Canon EOS M 5D. With the 15-45 kit lens and an expensive Canon (explains the expensive, $75 for the Canon logo) carrying case and batteries, etc.
And an 18-200 mm " over $1000 foot long lens".
The deal is a good one if the camera and lenses are what I expect.
His reference is a mutual friend.
Money may exchange hands Wednesday when I get a hands on look.
My questions:
Is this a mirrorless? It seems to be in the specs, but double checking.
That means my many Canon FD lenses will work with an adapter?
Last, what is your opinion of this camera?
I am not looking for comparisons, but info on this camera.
Thank you
Bill