Sony Alpha DSLR-A850

I have had this camera for about 1 month, I shoot with the Sony A700 as well. I had wanted to move up to FF and was at one point thinking of Nikon. I am glad I decided to stay with Sony, not only due to the investment in glass but I really like my A700.
Handling is very similar to the A700 with the exception of the to lCD.
I have had to get use to the FF experience such as DOF and no cropping.
The view finder on this camera is very nice (big and bright).
The overall use of the camera is very easy and has added a new excitement to my photography.
File size is a huge difference 24 meg. per file but 24 MP is worth it.
I have found that this camera produce a D-range that I have not seen on any camera. One thing this camera will do is show any weakness in poor glass. I have a Tamron 24-135 sp (FF) lens that performs very good on my A700 and looks poor on my A850. So you do want to pair it with good glass.

I have read that it has poor high ISO performance I would classify that as above 3200 it does not perform as well (but not horrible)

As far as on camera flash most higher end cameras don't have it.

FPS @ 3 I find that not a problem as well if you time your shots this camera will perform just fine even for sports. I have shot MotoX with a very slow Sony R1 with good results.

D-Range
Image quality nothing touches it

Overall handling

It does not make my coffee...

It would be nice if it would write raw files to one card and jpg to the other

N/A

I purchased the a850 to "extend" the width of my wide lenses, from their "limited" application on the APS-C a700 camera.

Functionally, the only differences I can find between the a900 Full Frame and the a850 Full Frame is the a850 has a slower burst rate (3fps) and no pre-focus with the eye -sensor. SONY states that it has a 98% viewfinder, rather than the a900's 100% viewfinder, but I really cannot see that as a problem. It uses all the a900 accessories w/o any modification and is identical to the a900 in appearance, other than the label.

Compared to the a700, the a850 does not have a built-in flash, so it will require a HVL-F20AM Compact Flash or something larger to provide it.

The camera is slightly heavier than the a700 ... and can use the a700's "Remote Commander" for optical wireless (line of sight) shutter triggering and playback control. The a850 does not include the remote as a cost cutting factor and it can be purchased separately, if you do not have one.

Also, APS-C lenses can be used on the a850, by putting the a850 into APS-C compatibility mode, which allows a full 11MP image on the LCD after the image is taken. The subject through the optical viewfinder will look a bit different, though.

There is no video or live view on this camera, but for most still camera purists, these are novelty add-ons and often more trouble than they are worth.

This camera represents one of the lowest cost entries into the Full Frame market. You will be hard pressed to find something else.

Allows lenses to return to normal stated focal lengths (35mm-film/Full Frame)
Lower initial cost of going to full frame
Good alternative if your subjects are none move types

Slower fps (3ps) than a900 (5fps) or a700 (5fps)
No built-in flash

a900
a700
a100
Maxxum 9000