Filter Ring Stepping
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What size filter ring stepping adapter should I get ?
My camera is a Canon Rebel Xsi.
I got this fisheye lens/Add On from Amazon, this one to be exact: http://www.amazon.com/gp/product/B000FW1…
And, I am having trouble putting it my normal lens? The title says it's suppose to fit my camera, yet the lens seems to small for my normal lens.
So, I assume that I need to get a filter ring stepping adapter
My lens is a 50mm f/1.8 II, and the fisheye add on is 0.42x.
So, what kind of stepping ring do I get? Could you show me a link?
When you ordered this $30 adapter, did it mention the filter thread size it fits? Without knowing the filter thread size on the adapter, there is no way we can say get a 39 mm to 52 mm step down ring and be accurate
Did you do the math and realize that a .42x filter on a 50 mm lens is NO where near being a 180 degree fisheye? That makes your 50 mm into a nice wide angle lens of 21 mm, NOT nearly of fisheye proportions (usually 6mm to 10 mm focal lengths covering the whole 180 degrees)
That add-on filter assumes you are using a 18-55 mm zoom lens and will be expecting "fisheye results" at 18 mm.
I hope you really did not believe the advert when it says a $30 add-on is a "professional Fisheye lens" The generic Sigma fisheye lens costs in excess of $850. The Canon fisheye zoom, $1,700.
What is going to happen is, the add-on lens that already vignettes on a 18-55 mm lens will do it even more if as you say, the threads on the 0.42x add-on is too small to screw onto the 50 mm lens
The filter threads on a Canon 18-55 mm lens are 58 mm
The filter threads on a Canon 50 mm f/1.8 II are only 52 mm, that means that in all probability, someone shipped the wrong filter to you
Here is a sample of what a real fisheye lens does, shot at a recent Sun's basketball game by my friend Max.
http://www.sportsshooter.com/members.html?id=4135
The fisheye shots were taken on a Nikon D3s with Sigma 8 mm f/3.5 fisheye lens ($899 for the lens only).
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