"One month before I sat down to compose this review, the tedium of scanning colour slides made me head out yet again to a couple of our big camera shops in Toronto to see if I could finally persuade myself the Nikon D70 viewfinder really wasn't that awful after all. I couldn't. Another big company's offering at the price point did little more for me (though I was actually somewhat relieved: didn't relish learning to cope with the ergonomic regression of lenses with no aperture ring). In an age when marketing departments have so much say, the calculated absence of critical 50-year-old technology shouldn't come as much of a surprise. It's pretty much common knowledge these days that a serious problem with entry-level digital SLRs is how very little of the budget finds its way to the viewfinder, which I maintain is one of the handful of body features to approach anything resembling a
sine qua non of successful camera design: if you can't see clearly what you're shooting, how can you shoot clearly?"
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photo.net/equipment/pentax/istds/I posted this because it summarizes nicely the problem I've had with all my Nikons. The Pentax K100DS has been an improvement, but as Vuk found with the istDS, still not up to the standards found in film SLRs. The K100DS has a .85x viewfinder magnification, the istDS is .95. I am very interested to use a K10D or K20D which also are .95 mag., and see if that helps much.
I attached a magnifying eyepiece to the K100DS and it improves the viewfinder image, but makes the field of view very tight. I can't decide if it is or isn't an improvement overall.