[eurostar]

At my local dealer, an used 645D has appeared on the shelf, for 5000 euros including the DAF 55. I am very attracted by the beast. In the past, I have been a large format user, view camera with 4x5" sheets and 6x7 and 6x17 rollfilms. I have never used 645 or 67 cameras, I have no lenses. But a friend of mine has 67II with 75 shift, 90 and 300/4 ED lenses that doesn't use anymore and would give to me to use freely.
I shoot nature, landscapes, details, macros and wildlife. For wildlife I would keep my K-5 and my A*600/5,6, up to the moment I would be able to buy the A*600/5,6 for 645, to use on both cameras.

Please, tell me all the reason for which I shouldn't buy the damn thing. Death of the siystems, first-curtain blur, noise of mirror: up to now, nothing I have read have been decisive to descourage me.

[revdocjim]

The reason you shouldn't buy the 645D is because you already have a 67II with some incredible glass at your disposal, and its free. This seems like a complete no brainer! Use the 67II and take fabulous photos.

[hks_kansei]

Main reason:
The lenses for the 67 are different to the 645, so you'd still need to adapt them

[Giklab]

Main reasons:
money
...
...
...
That's about it.

[Na Horuk]

And weight. The K-5 is much more practical than the 645D in terms of size, no?

[Mr Bassie]

Use the 67II. You can do a lot of film for 5000 euros

[goubejp]

May be because of the price of the 25 mm lens you'll need for landscapes. Around 5000 euros...

[Apapukas]

Can you buy at least 50k shots of 67 film for 5k euros?
645D is tested for at least 50k.

[MrPhil]

Sorry can't

I switched to a 645D from my D800e purely for landscapes. Matched with the 35mm manual focus lens and it is brilliant. Best thing I did for my photography :-)

[eurostar]

Sorry can't

I switched to a 645D from my D800e purely for landscapes. Matched with the 35mm manual focus lens and it is brilliant. Best thing I did for my photography :-)

I guess that I will stop to eat and buy the camera...

[normhead]

Believe it or not, I saw one locally for $3500 with an AF 55 lens. Someone else got there before I did.

[bull drinkwater]

Sorry can't

I switched to a 645D from my D800e purely for landscapes. Matched with the 35mm manual focus lens and it is brilliant. Best thing I did for my photography :-)

you'll just have to buy one plus an adapter like I did.

[SpecialK]

You could buy a lot of beer instead. But if you want it, that almost the same as needing it, so you should buy it. Otherwise you will always wonder about it. If it turns out you don't like it, you can sell it and have the experience of ownership.

[FrankC]

I purchased mine in December of 2011 for landscape, macro, portraiture and still-life photography. So after using it for two years, I've got a few gripes:
1. The price has fallen $3,000 since it's introduction to the US market without there being a replacement. I know this isn't con for the camera, but it still makes me feel better to let it out.
2. If you're shooting with shutter speeds > 30 seconds, the camera will take a dark frame of equal length. Night shots or sunsets with ND filters take twice as long. There's no way to turn this "feature" off.
3. No ultra-wide zooms. The 35mm is awesome, but still, what made Canon so popular in the late 80s (1st to introduce a 20-35mm) and now Nikon (with their 14-24) has yet to adopted by Pentax.
4. Flash synch at only 1/125. If there were more LS lenses available, this wouldn't be such a big deal.
5. No live view.
6. Takes about 15 seconds for an image to appear on the LCD. This can be avoided by turning the on/off switch in the opposite direction and the camera will take a low-res JPEG which will show up in a few seconds.
7. Only 1 FPS.
8. Not very speedy AF, but if your shooting El Capitan, it's not a problem. Besides, it's not designed for sports in the first place.
9. ISO limited to only 1600.
10. I've never needed to shoot tethered, but I hear it's clunky to do so with the 645D.
11. The 645D II is rumored to be released this year.

With all of these points against the 645D, if I had to do it all over again, I would. I don't need a fast AF system, I almost always shoot at ISO 100, I rarely ever chimp, I don't need to be tethered since I don't do studio work, So for me it boils down the lack of ultra-wide prime/zooms.

[MrPhil]

So for me it boils down the lack of ultra-wide prime/zooms.

I still carry (for now) my D800e and a Zeiss 21mm and 18mm to cover this - but I am finding I am not using them but using the Pentax and 35mm. If pushed you can always stitch a couple of shoots to get the wide FOV