Canon 70D vs 80D

[DebinOz]

I am looking for a 2nd camera to use with a clip in filter with my WO61ii. I currently have a 6D2 which can’t take filters and my budget has been trashed by buying mount, scope, guiding setup. I am looking at 2nd hand 70D vs 80D. The 70D is half the price of the 80 however I have read that there is a dramatic difference in iso and dynamic range with the 80. Has anyone used either of these and can offer advice on whether the 89D is worth the extra? I can’t afford a dedicated Astro cam yet!

[sharkbite]

i dont have either of these, but depending on what else you intend to use the camera for, a 200d might be a bettter option?

if you can trade off a few functions that are not applicable, like fast autofocus, weather sealing, fps.....(to name a few)...

the 200d has better dynamic range than either the 70d or 80d, is half the weight, and can be found second hand way cheaper.

My son has one - its a little cracker, and does some wonderful night time panoramas with the stock lens...

im not sure if the 200d can take clip filters either, but since its an APSC,
should work well with a 1.25" filter setup...

[Mickoid]

Sharkbite's advice is worth considering if you want to stick to Canon. Weight is certainly important when choosing a camera for Astro work. It looks like you should be able to grab one of these second hand for under $500. There's one selling on Gumtree in North Ryde for around that price, I'm sure you could make a reasonable offer. Good luck!

[DebinOz]

Thanks - that does seem a good option, except the model is not listed as compatible with the optolong L enhance I have. I have been using it with a 750d crop sensor borrowed from my son.

[JA]

Hi Deb,

Instead of a 70D or 80D which will be of lesser quality and dynamic range than your Canon 6D2 why not simply use your 6D2 with SCREW IN M48 filters rather than clip in body mounted type filters on APSc. You need an appropriate Canon T mount with 2inch tube threaded on the end for M48 and of course your telescope needs to be able to fit a 2inch input tube (just checked it does according to online specs). Then you just need some m48 size filters which range from little to lots of $.

Looks like you're good to go.

If you already use the 6D2 on your telescope you probably already have a Canon T mount, in which case you may only need a 2inch adaptor which screws in to it AND WHICH also supports screw in M48 (2inch filters) as per link below. Talk to Bintel perhaps as you're in Sydney...

https://bintel.com.au/products/bintel-camera-adapter-2-inch?_pos=7&_sid=9103defc5&_ss=r

Best
JA

PS: You likely already have the canon t-mount, maybe even with a similar 2 inch tube to suit your telescope's focuser. If so you just need to check that it has an M48 thread (for a 2 inch astro filter) on the non-camera i.e: telescope end.

[DebinOz]

Thanks! Sounds like a great option as well. I do have a T adapter. Of course I would need to buy a new filter but as I would want to buy new filters for other things in the future this may be a more long term solution. Eventually I would want to buy a 2nd camera to run two setups at a time during Milky Way season. I hope to eventually own an Astro cooled camera so maybe I should go with screw in filters I can use with that. Is that possible?

[JA]

Can you post a photo of your Canon T-adapter and (?) 2 inch nose piece that goes into your telescope? Does it have an M48 thread at the open (telescope) end? If so I may have an even better idea for VERY little cost.

BTW if you want to buy a 2nd camera, and if it has to be Canon, I'd simply go for another 6D or 6D2 as they'd perform much better than the 70D and 80D and have something like 1.5 stops of extra dynamic range and be much cleaner noise wise. A 6D can be had for ~$400-600 if you look around or $700ish for a 6D2.

Best
JA