Bison Bud wrote:
I love my Pentax K3, but have to admit that I've long been disappointed by it's low light performance! I would really like something that will give me the ability to shoot well in low light and have acceptable noise levels. Since my lens stable contains only Pentax and Canon lenses and that fact that I'm disabled and on a low budget, I've been looking at either a used 5D Mark II or possibly the older 5D.
I think either would be a big improvement for me with the biggest difference, other than price, being in the amount of sensor pixels with the 5D having only 12.8 MP and the 5D Mark II having 22.3 MP. Anyway, from many discussions here, it would seem like the full frame sensor with the bigger pixels (5D) should actually have the better low light performance. However, the 5D appears to max out at 1600 ISO and I have to wonder whether the bigger pixels will make up for that and give me the low light performance I desire. The Mark II apparently goes up to 25600 ISO and has almost double the pixels, which should help with resolution and the ability to crop, so it's been a bit of a toss up for me. Financially I'd prefer the 5D, but think I would probably be better off the 5D Mark II if I can swing it.
Anyway, I'm having real trouble making a final decision and pulling the trigger on either of them. So, I'd really appreciate hearing your take on this situation, especially if you have personal experience with both cameras. Man, I'd love to have a new 5D Mark IV, but that's just not going to happen! Thanks for any input you might provide and good luck and good shooting to all.
I love my Pentax K3, but have to admit that I've l... (
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Don't do it. I think you'll be disappointed.
I have a 5D Mark II... I bought it for low light specifically. It was "the best" at the time... better than the APS-C cameras of the day, certainly. HOWEVER, today's APS-C are better at high ISO work.
I never bought the original 5D... primarily because of it's reputation as a "dust magnet". But it's also only 11MP (a lot at the time, but not now). AND, it has a very primitive AF system.
5DII got increased to 21MP resolution. It also got a self-cleaning sensor, which in my opinion is a major game changer. Another feature added was Micro Focus Adjustment. And, for more shots per charge, the 5DII uses newer battery tech, was the first Canon to use LP-E6/LP-E6N batteries (which are still used today in several models).
HOWEVER, 5DII uses the same old 9-point AF system as the original 5D. Contrary to an earlier post, neither the 5D nor the 5DII is a "sports camera", by any means. They are hobbled with a simplistic AF system that's just not up to the task and don't have fast enough frame rate... at least they aren't nearly as good at action photography as other Canon models. Note: 5D/5DII actually have 15 AF points when the AF Assist feature is enabled, the camera is in AI Servo mode and All Points Auto is selected. However, the add'l AF points are "invisible" and are not user selectable. It is of limited help with moving subjects. The original 6D uses a similar AF system. These date back to the 20D and 30D... and today are only used on the most entry-level Rebel T7 and SL2 APS-C models.
You would need to get at least 5DIII if you want a higher performance AF system (61 point, 41 of which are higher performance dual axis type). Aside from the entry level, ANY of the APS-C models also have much better AF systems. 7D Mark II uses 65-point, all cross type. Rebel T7i, 77D and 80D all use a 45-point, all cross type system. The full framefull frame 6D Mark II uses very similar 45-point system, while the 5DIV and 1DX use a 61-point, all cross type system.
I am not familiar with Pentax DSLRs, so can't directly compare. But I can tell you that my much newer 7D Mark II (APS-C) have much higher usable ISO than my old 5D Mark II (and certainly the original 5D, which has a more limited ISO range). I don't think this would be a very good solution for you. Probably a newer APS-C Pentax or, if you can swing it, their full frame model, would serve you better.