[Close-Up] Perfect for close ups on bugs, frogs, flowers, mushrooms, etc. Its heavy but really cheap and hand if you dont have hundreds of usd to buy a macro.

[Glass] Great book, just getting into Macro, so this will help me a lot.

[Brass] I use this on Nikon's f 2 135mm lens for close up food photography. It maintains edge to edge sharpenss and since is is completely coated color is good too. The treads were a bit tight the first few times I used it.

[Single Coated] I do some charity work for the Now I Lay Me Down To Sleep foundation. This requires some very close work of babies' hands and feet. Buying a dedicated macro lens was one option, but this fills the bill much better. I use it on a Nikkor 17-55 or 24-70. Saves changing lenses during a session and is plenty sharp considering the use for which it is intended. For this work it is a true bargain.

[Glass] I use this with my Polaroid 180, using a finder from the close up set made for the Polaroid 250 (much cheaper than the set made for the 180). I use a 45-46mm filter adapter in order to mount this to the lens. This should also work for the Polaroid 190, 195. In the case of my 180, the the addition of the adapter ring means that this lens is not at the same distance as what the RF finder was calibrated for. I found that with the camera RF set at the 8 feet mark, the focus in the RF is correct with the image focus. That makes it very simple to make closeups. It has the usual high quality of construction from Heliopan. The brass ring means that it can be removed easily from my aluminum filter ring adapter without binding. It's a great item for taking pictures of flowers in the garden.

[+1] This high quality lens is multicoated, so the risk of flare is minimized. Also, the brass mount prevents seizing on lens mounts. As a Polaroid pack film buff, I use a 45-46mm step up ring in order to allow me to use common 46mm filters on my Polaroid 180. I think the 195 has the same 45mm filter size. Use the appropriate viewfinder goggles from a Polaroid 581A Portrait kit (for the 250, but the Zeiss rangefinder is the same as the 180), and the world is your oyster! This gets you out of the 5 feet minimum focus of the camera into an intimate portrait distance. The high quality of the close-up images, even wide open and at minimum focus, is quite astonishing.

[Close-Up] Works just like it should. High quality. Good solid build, nice threads.

[Bay 60] I purchased this filter with the +2 lens. Both have excellent optical quality and can be used in conjunction to get a +5 result. Light to carry, a bit slower to install than a macro lens but with all the benefits and none of the drawbacks ie, higher cost, bulk and weight. Embarrassingly, when I first attached them I could not get things to focus as I was keeping the distance required by my macro setting. But as soon as I closed in, Voila, it is like photographing through a microscope. Bug pictures here I come.

[Glass] Like all Heliopan, this filter is super high quality German design and make.
Magnification allows me to shoot flowers in macro, while beautifully distorting everything around.

[0.25 lb] Perfect for macro photography with no need to empty your bank account