Summary: I was late in the game on finding a Tele lens for my Sony DSC H50. The official tele lens for DSC H50 is no more available at Sony. Therefore the price of that in the market is very high ($200-$300). So after going through all the reviews on Sony VCL-DH1758 Tele Lens, I purchased this. As this is 58mm and H50 adapter is 74mm, I got a 74-58 mm step-down ring for $4.00 from ebay. This product came on time and I received the step-down ring also.
Summary: First of all - great service from Amazon. Bought this for my DSC-H5 and I couldn't be happier. If you own an H series Sony don't buy an off brand converter lens - the VCL-M1758 is made specifically for the H series. Just remember not to use it with your native lens set to wide angle (zoom out to at least 115 or 120mm focal length). Also you will not loose any f-stops with this teleconverter.
Summary: This was a gift for my fiance. He likes how close you can get to far away objects. It is a bit clunky and is very large for the camera. Also, you have to remove it if you want to take any pictures close up. So, off and on, off and on. If you're a camera buff and going out to do a lot of distance shots, it's great. For vacationing, not as convenient.
Summary: Great lense and easy to put on. The picture quality was good but not great in my opinion. I think I expected a little more out of the zoom than what I got but that was my fault because the lense is what it is. I would recommend this lense to anyone who is looking for a little more distance in their shooting.