wide conversion lens - rectilinear?

[J Davis]

I'm really interested in a wide rectilinear field of view - where the lines stay straight as opposed to fisheye.

If I start with a rectilinear lens, for example nikon 24mm f2.8 (thread = 52) and I add a wide conversion lens onto the front, will the image stay rectilinear?

[yslee]

Yes, provided the converter isn't a fisheye. However most of such lenses are fairly low in quality, so the barrel distortion, resolution and contrast will be in question.

[J Davis]

Are there any really good quality ones out there?

[yslee]

None that I know of. Thus the reason why I'm a little miffed at the lack of wide primes. Does anyone know the email for the Panasonic product managers? :P

[DonalDuc]

I like my $50 fisheye :-)

http://forums.steves-digicams.com/986410-post146.html

[J Davis]

I like my $50 fisheye :-)

http://forums.steves-digicams.com/986410-post146.html


Finding non fisheye wide is the trick. I can't have my actor walk in from frame right using a fish eye and then cut to a medium close up then back.

Basically the kit lens gives us 14 thru 20mm at f4 to f4.4.
I just got a canon FD 17/3 for $130 but I got lucky on that price and I gained what ..?
How much light?
If you want faster than that you need to drop a grand for a prime which is why I was asking about converters. I've never used one.

[commanderspike]

I like my $50 fisheye :-)

http://forums.steves-digicams.com/986410-post146.html

What's the details of the fisheye adapter Duck?

I tried screwing one onto my 50mm Canon F1.4 FD lens for a laugh. It does actually give you a wider field of view, but degrades image quality dramatically - I don't mean distortion, which I love - just general weirdness and ghosting.

[Ben_B]

Optics compensation in like After Effects can help you get rid of fish eye distortion in post...if you're shooting your project 720p (assuming you're doing 24p in post) just shoot the fisheye parts 1080p in order to not lose resolution when you do optics compensation.

[yslee]

De-fishing is very tricky. Read up about the efforts to do so with the Nikkor 10.5 DX fisheye.

[Summy]

don't know the the quality of attachments lenses from Cavision, if anyone got any experience i would be interested to hear it, suppose the broadcast series would be most interesting.

http://www.cavision.com/optics/wideangle.htm