DK-21M Magnifying Eyepiece

It only improved the image quality very little. When I look through this viewfinder I still strain my eyes, parts of the view look blurry I cannot be certain whether or not the whole picture is completely in focus. My pictures are still blurry and not the crystal clear full detailed image that I need. Not in the least bit happy with this product or Nikon as a whole.

Just bought it today and was installed in-store on my D7100. I immediately noticed I could actually now see the info at the bottom of the viewfinder instead of just blurs. Also helps keep my face from smearing up the big lcd screen. Two birds down with one new eyepiece. As much as I like it, $30 is still $30. Half that would have been better. It´s staying on my camera full time.
Easy to install. Does what it says.

it improves the viewfinder and is very helpful when focusing it`s always on my camera

PROS: Bigger image. You can read the data in the viewfinder on baseline
CONS: Little eyepiece glass so you need to put your eye very close. Poor eyepiece ergonomic design, it can be fall out.

I just put this eyepiece on my D5100, and though it does not make a huge difference, it is significant enough to make it well worth the few dollars it costs, and a very welcome upgrade to my D5100. It really helps to focus on long zoom shots. It stands about 1/4 inch further back than the rubber eyepiece that comes on the camera, which is also better; it gets your face off of the monitor screen. And in contrast to what I´ve read on some reviews from other websites, it does not take away from the area of view of the viewfinder; at least not on the D5100. I can easily see the entire rectangle, and what´s inside it, better than without it. It is now a permanent part of my D5100; I will never take it off!!!

Used it on D40 and D5000 -

viewfinder picture is clear and sharp and appears much bigger

easy to attach

DK-21M extends a bit making camera handling a bit easier

definetely recommended, price is ok as well

worth trying

This eyepiece magnifies what you see by a factor of 1.17x. Meaning, whatever you see in the viewfinder will be magnified by 17%. Unfortunately, the DK-21M viewing hole is a lot SMALLER than the original viewfinder which I find strange because the reason people buy this is to get a bigger, better , crisper and an unobstructed view of the image being composed , eg. like on a D700 upwards. Is this a design flaw? The 17% magnification also obscures some corners of the image in the viewfinder depending on the placement of your eye. I bought it, used it once and now it just sits in my bag. It´s an accessory that you might want to skip. Regards from Malaysia :)

I purchased one and having to wear glasses does not help at all. To use it had to remove specs and still found that the View Hole was too small. A BIG LET DOWN