Kingma BP-511 Rechargeable Battery For Canon EOS 20D/30D/40D/50D/5D/300D/G3/G5
Battery Model: BP-511A
Voltage: 7.4V
Capacity: 1600mAh
Battery Type: Li-ion
Dimensions: 80*64*24.5mm
Net Weight: 78g
Compatible with the following Canon models:
EOS 10D
EOS 20D
EOS 20Da
EOS 300D
EOS 30D
EOS 40D
EOS 50D
EOS 5D
EOS D30
EOS D60
FV10
FV100
FV2
FV20
FV200
FV30
FV300
FV40
FV400
FV50
FVM1
FVM10
Optura 10
Optura 100MC
Optura 20
Optura 200MC
Optura 50MC
Optura Pi
Optura Xi
PowerShot G1
PowerShot G2
PowerShot G3
PowerShot G5
PowerShot G6
PowerShot Pro 1 / Pro1
PowerShot Pro 90
PowerShot Pro 90 IS
PV130
ZR10
ZR20
ZR25
ZR25MC
ZR30
ZR30MC
ZR40
ZR45MC
ZR50MC
ZR60
ZR65MC
ZR70MC
ZR80
ZR85
ZR90

Medium Format
Medium format refers to the size of your roll of film (or if you’re talking digital, it’s the size of the camera sensor). It really just means that you are shooting on a bigger piece of film than you do with a 35mm camera. The increased size of medium format film means a much larger negative. This will give you finer details and less grain.
Choosing your Right Medium Format Camera
Twin Lens Reflex (TLRS)
TLRs use two objective lens of the same focal length. The photographic objective lens is the one that is used to take the picture. The other lens, called the view lens, is connected to the viewfinder. Most TLRs are fixed focal length, and the more expensive models may incorporate a rudimentary room function. Most TLRs use a leaf shutter system, resulting in high speeds, quiet operation and low shutter vibration. There are also close-up, wide angle and telephoto adapters for TLRs.
Some popular TLRS cameras are: Yashica MAT-124G, Rolleiflex 2.8F, Minolta Autocord and Mamiya C330


Rangefinder
Rangefinder cameras are medium format cameras with a range finder. This negates the waistline, viewing that most TLRs carry. They are also much smaller than TLRs, and allow for easier point and shoot photographs. They tend to have limited focusing ranges, and do not have lenses larger than 180mm or 200mm. Rangefinders are quieter and easier to focus in dim light. They are mostly fixed lens models, but higher range models also provide for interchangeability.
Some popular rangefinder cameras are: Fujica G690, Mamiya 6/7, Bronica RF645, Norita 66 and Pentax 67
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