Rodwil

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GoofyNewfie Loc: Kansas City

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Screamin Scott Loc: Marshfield Wi, Baltimore Md, now Dallas Ga

I have a pair Dine 105mm macro lenses (made by Kino Precision) and several Dine ring lights (Most were made by Sunpack but one is a Nissin made one). Got my first lens and light from my Father in Law when he retired from Dentistry....I use them for shooting macro. Bear in mind that the shorter the focal length of the lens, the closer to the subject you have to be, a 35mm would put you too close IMHO.. My current dentist doesn't use normal camera/lenses anymore either. BTW, I used to manage a Dental Center years ago...

ELNikkor

The Pentax WG3 ($160), or the Richoh WG60 ($225) have great macro with a 6 led ringlight array. Might be perfect for a dentist.

billnikon Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont

If you want to do it right, get a Nikon 120 mm medical Nikkor.
https://www.ebay.com/itm/Nikon-120mm-F-4-IF-Medical-Manual-Focus-Lens-with-Caps/372641789415?epid=99688752&_trkparms=ispr%3D1&hash=item56c32e75e7:g:OK4AAOSwrw1cq0Yh&enc=AQAEAAACQBPxNw%2BVj6nta7CKEs3N0qUHT303oWjRB%2FFrPg89HJPSH8P4ynRrD%2BmmTduer4BAUQcRw87gLU7AN4A5ckJVdb7sd2H7ZdkKZchEdwN2sYPKkEdSHuQdkD%2F1cNDcxEIrwO0p2%2FqaAbcEweAEsULuMl1dK%2F0zLArUM0M37%2F5u0Toi%2FhnT%2FNqV6dEVo2u9HlaZ559RowvpWeNZacdV9wxtrl0fCYEd%2FAfQhzZ3VuEzUhLlW6mVdCS7ju%2BnQpnhrYuw3pCwc8fDV9s07361%2F4l2a5IBq1YWW%2BLgQF5uQojhCQDNDhhMEXfnCgxdfrBPFUITfJIcyR5UmAzKFmHIUVQzYvvGNvAHRUz8aRAxj3Djd8ReN2kbOB%2B4U0N0rqhTwlOROQ3bTEJ%2BfeXE6MPfwaF0jWgadI47zLkPTRftzdIHJjHX7bRZsJQiIf%2Bdy7k%2Bbsn0FRwoR5VL6834CYvauxJkjfcl%2BJKu4IG2Z9%2FTAfkXZWRs71HPgT6pXUII5uJI1FMzaGfKbqMmMxue1%2BuTZLvISLGSXG4hVk5hiHcMdIs5dFfwlROoL5EdMVwRV02zS7XZ6615xCz5av4auqmwgv76Y%2BCahvyOCniO4%2BOavLto6EYoYrHs9acZiJmCgORxaoRgVPd5Ir7XGoAtyiSsA8lyie%2FHTdbrb8H48m%2BAQiOHNUlH348Ca31MAEDWsSHxnZTourXm9Fp8SiKFOI6zUDnl9MwmrneWu0y5iDOT%2Fkzv7FwUdhLsUu%2FH0NheTrw2%2BcBC8A%3D%3D&checksum=37264178941538593fcf43534a60b9ff4544d58e599b&enc=AQAEAAACQBPxNw%2BVj6nta7CKEs3N0qUHT303oWjRB%2FFrPg89HJPSH8P4ynRrD%2BmmTduer4BAUQcRw87gLU7AN4A5ckJVdb7sd2H7ZdkKZchEdwN2sYPKkEdSHuQdkD%2F1cNDcxEIrwO0p2%2FqaAbcEweAEsULuMl1dK%2F0zLArUM0M37%2F5u0Toi%2FhnT%2FNqV6dEVo2u9HlaZ559RowvpWeNZacdV9wxtrl0fCYEd%2FAfQhzZ3VuEzUhLlW6mVdCS7ju%2BnQpnhrYuw3pCwc8fDV9s07361%2F4l2a5IBq1YWW%2BLgQF5uQojhCQDNDhhMEXfnCgxdfrBPFUITfJIcyR5UmAzKFmHIUVQzYvvGNvAHRUz8aRAxj3Djd8ReN2kbOB%2B4U0N0rqhTwlOROQ3bTEJ%2BfeXE6MPfwaF0jWgadI47zLkPTRftzdIHJjHX7bRZsJQiIf%2Bdy7k%2Bbsn0FRwoR5VL6834CYvauxJkjfcl%2BJKu4IG2Z9%2FTAfkXZWRs71HPgT6pXUII5uJI1FMzaGfKbqMmMxue1%2BuTZLvISLGSXG4hVk5hiHcMdIs5dFfwlROoL5EdMVwRV02zS7XZ6615xCz5av4auqmwgv76Y%2BCahvyOCniO4%2BOavLto6EYoYrHs9acZiJmCgORxaoRgVPd5Ir7XGoAtyiSsA8lyie%2FHTdbrb8H48m%2BAQiOHNUlH348Ca31MAEDWsSHxnZTourXm9Fp8SiKFOI6zUDnl9MwmrneWu0y5iDOT%2Fkzv7FwUdhLsUu%2FH0NheTrw2%2BcBC8A%3D%3D&checksum=37264178941538593fcf43534a60b9ff4544d58e599b

Screamin Scott Loc: Marshfield Wi, Baltimore Md, now Dallas Ga

The problem with that is the need for a power supply to run the light and the fact that that power supply needs to be close to an outlet...

mikedent Loc: Florida

We used Canon XTi with 90mm Tamron 1:1 macro and Canon ring flash for many years. Allowed for RAW images if desired but we stayed with jpegs. Worked great for labs and pathology photos. Bought some new, some used from ebay.

billnikon Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont

And patients are not close to an outlet?

Blair Shaw Jr Loc: Dunnellon,Florida

After reading this post , I realized that Canon actually makes 2 types of these lenses : EF-M 28mm & the EF-S 35mm.....I had no idea !

So I Googled them and eventually wound up on Wikipedia where I learned that the EF-S 35mm f2.8 lens comes with IS...Af/M capability and L & or R LED ring lighting built into the front of the lens .
They further-explained that it is designed for APS-C camera sensor sized cameras with manufactured dates after 2003 , so your friend's T-6 will be fine .......all the Rebels up to 7DMKII are okay.

Amazon has them for $300 but that is way cheaper than the regular Canon Ring Light that retails for about $600 and is as one member indicated Expensive !

This would be an item I would want to test before I purchased it I am afraid cause when you're in close and under magnification ,you tend to need more light and the temp.of that light can be critical to get your balance into spec. This is not an area where I have any real experience lately and others will probably have more to say about this consideration as it will determine the user's outcome in real time --up close & personal as dental stuff is.

GoofyNewfie Loc: Kansas City

I went by my local camera store yesterday to check it out and the LED light is not bright enough for intraoral photos. It's just bright enough to provide fill light. (See my previous post) The 35mm length (56mm FF equivalent) is probably a bit too short for an esthetically pleasing rendition of the mouth.

Screamin Scott Loc: Marshfield Wi, Baltimore Md, now Dallas Ga

Most LED units are not good enough for any type of macro shooting. Macro being my niche, I want a flash unit as it is more powerful and it allows one to stop down the aperture for increased DOF plus has the added benefit of stopping motion, be it your own or your subjects. Ring lights with batteries in the power units ( most being mounted in the hot shoe) are a lot more versatile than DC powered units...

BobHartung Loc: Bettendorf, IA

My dentist now uses a small pencil camera that feeds images directly into his computerized information/records system that has full history and all the digital X-rays of my teeth. Much better system than trying to describe subtle items even when you know the specialized lingo.

GoofyNewfie Loc: Kansas City

Heck NO!!!!
Besides the OP having a CANON camera (though you could use an adapter), it's an APS-C sensored one.
That combo will give a FF equivalent of about 190mm.
The working distance required will keep prevent the dentist from manipulating the mirrors and retractors used to get buccal, lingual, and occlusal views of the arches because he will be too far away.
It's hard enough to reach using a 100mm on an APS-C body.

And this thing is huge compared to what's available now.
I used it back in film camera days.

Screamin Scott Loc: Marshfield Wi, Baltimore Md, now Dallas Ga

Thanks Goofy.... You beat me to the punch in listing the negatives of this lens for the OP

GoofyNewfie Loc: Kansas City

It's definitely a unique lens, but a dinosaur.