Background
There were several versions of the EOS-1N available. The base model EOS-1N consisted of the standard camera body with significant upgrades over the EOS 1, launched in 1989. The EOS-1N DP comprised the standard body and the BP-E1 pack (see below) and the EOS-1N HS comprised the standard body plus booster (see below).
One feature the EOS-1N (and previous/subsequent '1' models) lacks, which lower models in the range have, is built-in flash, intentionally omitted to provide an overall very rigid camera body able to withstand severe treatment by professionals. Weather sealing was incorporated after feedback from working professionals. Other notable omissions are the eye-controlled focus feature of the EOS 5 and the bar code reader of the EOS 10, neither of which are professional-level cameras.
Another feature of the EOS-1N, and other professional models in the range, is the provision for a precise viewfinder indication of exposure in manual mode. This had previously been provided in fully manual cameras such as the F-1, but older Canon cameras with automatic exposure modes merely provided a recommended exposure reading in manual mode, leaving the user to accept the offered settings or not. The EOS-1N provides a viewfinder readout similar to the old F-1's needle display, but in electronic LCD form showing steps in 0.3, 0.5 or 1 stops. Like the EOS 5, the internal displays of the EOS 1N self-adjust in brightness in response to the brightness level of the subject.
The optional Power Booster PB-E1 or Battery Pack BP-E1 attach to the base of the camera. The booster (PB-E1) holds 8 AA batteries or an optional Ni-Cad pack, and boosts the standard drive from 3 frames per second to 6. The Power Booster E1 has its own shutter release and input dial for use when shooting in the vertical format. The battery pack (BP-E1) is a lighter and simpler accessory. This holds 4 AA cells and a lithium battery, and you can select between the two power sources with a switch. It provides a grip for vertical shots but no additional controls. The major appeal of the Battery Pack BP-E1 is that is lighter and less expensive than the power booster.
In addition to the standard EOS-1N there was another, specialised model in the range — the EOS-1N RS, introduced in 1995, with a permanently attached power drive booster. This camera has a fixed pellicle mirror so there is no viewfinder black-out at the moment of exposure. The fixed mirror allows high-speed continuous shooting at a top speed of 10 frames per second, with a shutter release lag as low as 6 ms. There is a cost to this however: slightly less light reaches the film, as some is always being directed up to the viewfinder. By the time of the release of the next generation EOS 1V, considerable technical improvements to the standard camera design meant that Canon no longer offered RS model variants.
The EOS 1N was discontinued in 2001 with the arrival of the EOS 1V.
Read more about this topic: Canon EOS-1N
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