Thanks for all your help guys. This is not my camera so I'll not be buying a new viewfinder for it. But this is a real issue I'll have to consider when I buy one of my own. It's so annoying, but not surprising, that viewfinders are worse now.
On a side note, and perhaps this need a separate post, what is the obsession with hugh ISO's? When I'm taking photographs I invariably want as low an ISO as I can get. Yesterday I was playing around with a Canon s45 from 2002 and I could get it's ISO down to 50. This Nikon will only reach down to 100! I can't be the only one that feels camera technology is set on a different path from where I want it to be. Can I?
Love,
B
I shoot with manual focus a lot these days and I find it easier to use the triangle and dot focus indicators on my D2x and D3x than a split prism, let alone ground glass. It's faster, and generally more accurate for critical focus than a prism.
"As low an ISO as I can get" is a completely
meaningless goal. Sensors have one base ISO, everything else is signal manipulation, and therefore a source of noise and generally, reduced dynamic range. Manufacturers will set the base at 100 or 200 because most people will shoot that and higher, and anyone who needs slower shutter speeds is likely to be savvy enough to purchase some ND filters- since you have full dynamic range and no noise at ISO 100,
what would be the point of ISO 50? You get the best quality image for a particular sensor at that sensor's base ISO setting, anything else is worse, and that includes the artificially low ISOs. Nikon's professional bodies all base at 100, their consumer cameras base at 200.
The D5000's base is ISO 200, setting it on Lo.1 just makes your images worse. Here's what DPR has to say about Lo.1:
The base sensitivity of the sensor used in the D5000 is ISO200. There is also a Lo 1.0 mode that attempts to mimic ISO 100 but it's effectively just ISO 200 over-exposed by a stop. The result is that the sensor becomes saturated and clips to white quite easily, limiting that mode's dynamic range. For most applications, you'd be better off buying a neutral density filter if you need slower shutter speeds than ISO 200 will allow.
Given that digital cameras shoot like positives (slide film,) increasing the chance of clipping the high part of the signal is just plain dumb. Only someone who didn't understand digital cameras would choose it under any circumstance other than where they absolutely needed a stop slower shutter speed and didn't have an ND filter available.
Paul