7mm (micro four thirds equiv.) prime lens

[PhilD]

Hello,

After watching this video (http://www.vimeo.com/5287593) I want a 7mm lens without paying one thousand dollars. I'm sure it's possible for less than 100$. I don't care about losing the 8mm to 13mm range and autofocus. I've heard that there are both 7mm lenses around the same size as micro four thirds, and 3.5mm surveillance camera lenses for 10 bucks (if it's the same multiplication factor as Canon FDs on Micro Four Thirds, then it should be around 7mm on the GH1).

The question is, what lens and what adapter?

Thanks!

[Ben_B]

Go grab a fisheye lens and an adapter. Or some other lens and a fisheye adapter.

[Ben_B]

Don't know if the site is reputable but if you want a super wide view something like this? http://www.rugift.com/photocameras/zenitar_m_fisheye_lens_for_panasonic.htm

[Rabot]

That FOV was 14mm. Even it was said to be 7 to 14 on a 4/3rd lense. The FOV indication are always for 35mm format.

[PhilD]

14mm - not wide enough - that's what I get with the kit lens

[Barry_Green]

Peleng 8mm. Around $300 on ebay. You can get it in Nikon or M42 mount and use adapters to your M4/3.

In fact, I have one of them, and I might try it out on my GH1 just to see what it looks like... :evil:

[PhilD]

Peleng 8mm. Around $300 on ebay. You can get it in Nikon or M42 mount and use adapters to your M4/3.

In fact, I have one of them, and I might try it out on my GH1 just to see what it looks like... :evil:

http://www.rugift.com/photocameras/peleng_fisheye_lens.htm

It says 8mm for all mounts (Canon EOS, FD, etc.) but it that's really 8mm on the FD mount that means it'll be 16mm on a micro four third camera.

[admactanium]

14mm - not wide enough - that's what I get with the kit lens
You don't seem to understand. The kit lens says 14-140mm but it's an equivalent 28-280mm. The Panasonic 7-14mm lens is equivalent to a 14-25mm. If you want the video to look like the video in that link then you need a 7mm lens. The focal lengths are always listed in the same measurement. Then you have to do a FOV conversion based on the camera's crop factor. So you seem to want a 7mm lens for a 14mm FOV rather than a 3.5mm lens right? The 14mm on the kit lens is a 28mm equivalent.

[PhilD]

So you seem to want a 7mm lens for a 14mm FOV rather than a 3.5mm lens right?

Yeah. I still don't understand 100% the crop factor multiplication.


The question is

Fisheye MC Zenitar-M 16mm f/2.8 Lens for Panasonic G1 (http://www.rugift.com/photocameras/zenitar_m_fisheye_lens_for_panasonic.htm)

vs.

Peleng 8mm (http://www.rugift.com/photocameras/peleng_fisheye_lens.htm)


Both say they have a 180 degrees field of view.

[Rabot]

Peleng 8mm. Around $300 on ebay. You can get it in Nikon or M42 mount and use adapters to your M4/3.

In fact, I have one of them, and I might try it out on my GH1 just to see what it looks like... :evil:

I'd really like to see it in action.

[PhilD]

I've found some pictures made with them on eBay:

http://cgi.ebay.ca/NEW-FISHEYE-Peleng-3-5-8-mm-MICRO-4-3-PANASONIC-G1-GH1_W0QQitemZ400057673917QQcmdZViewItemQQptZCamera _Lenses?hash=item5d254ba8bd&_trksid=p3286.c0.m14&_trkparms=65%3A12|66%3A2|39%3A1|72%3A1215|240%3A13 18|301%3A0|293%3A2|294%3A50

http://cgi.ebay.ca/FISHEYE-ZENITAR-2-8-16-mm-MICRO-4-3-Panasonic-G1-GH1_W0QQitemZ400057676474QQcmdZViewItemQQptZCamera _Lenses?hash=item5d254bb2ba&_trksid=p3286.c0.m14&_trkparms=65%3A12|66%3A2|39%3A1|72%3A1215|240%3A13 18|301%3A0|293%3A2|294%3A50


Not sure if they were taken with the G1/GH1 but that's not the look I want

[Summy]

I might be wrong but people have recommended fisheye optics while your looking for an extreme wide angle, unfortunately i think extreme wide angles are a lot harder to come by at a decent price tag.

[PhilD]

I might be wrong but people have recommended fisheye optics while your looking for an extreme wide angle, unfortunately i think extreme wide angles are a lot harder to come by at a decent price tag.

Do you know if an additional adapter can correct the perspective distortion of a fisheye to make it extreme wide angle?

[Barry_Green]

Peleng 8mm on GH1.

7a9cdeb41511e7c3f5

[PhilD]

Ummmmmmmmmm okay. Maybe good for skateboard videos. I suppose I'll have to order the real deal (Panny 7-14).

[j]

Nice porch.

Bad Barrel.

[Horncastle]

Have a look at the Olympus 4/3 lenses. There's a 1:4/7-14mm zoom, a 9-18mm zoom and a 1:3.5/8mm fisheye. They won't give you all the functions of the micro 4/3rds lenses but I think you will save some money.

http://www.four-thirds.org/en/fourthirds/lense.html

[PhilD]

Have a look at the Olympus 4/3 lenses. There's a 1:4/7-14mm zoom, a 9-18mm zoom and a 1:3.5/8mm fisheye. They won't give you all the functions of the micro 4/3rds lenses but I think you will save some money.

http://www.four-thirds.org/en/fourthirds/lense.html

What I understand is, on these wide focal lenghts, unless it's a zoom lens, it's a fisheye?

Why is the "1:3.5/8mm" a fisheye when the 7-14mm isn't fisheye? Optics?

[Horncastle]

What I understand is, on these wide focal lenghts, unless it's a zoom lens, it's a fisheye?

Why is the "1:3.5/8mm" a fisheye when the 7-14mm isn't fisheye? Optics?

Hmm - good question!! I think it's partly optics - that 8mm lens seems to be optimized to give distortion. It's also probably because the wide end of the zoom is 14 mm so they prefer to call it "ultra wide".

Actually, on looking closer, not all the Olympus lenses are cheaper. Here's what I gather to be the differences roughly:

Panasonic 7-14mm. Around $1000. Used with RAW files for still photography with the G1/GH1 it apparently records metadata to remove distortion. This seems to be either in-camera or post processing, not sure, I think you can do either/or. The results look great but presumably this metadata has no relevance when shooting video??
There is a thread about it here:
http://forum.getdpi.com/forum/showthread.php?t=7089&highlight=9-18

Olympus 7-14mm. Around $1700!!!. Seems to be a great lens. No metadata for removing distortion.

Olympus 9-18mm. Around $500. By all reports a very nice lens too. You lose 2mm at the wide end but it's half the price of the Pany.

Olympus 8mm fisheye. Around $650. Definitely gives fisheye distortion.

[Barry_Green]

The Peleng is a full-frame fisheye on 35mm still film. It will actually project a full 180-degree field of view within a circle on the film, black edges around it and all. Because the GH1 has a frame more the size of 35mm movie film, you don't see all those edges. With the 2x digital zoom on, it looks pretty much like a wide angle lens.

Other wide angle lenses will be more "rectilinear", where they try to maintain the square edges that you want. The Peleng doesn't do that, but it's crazy wide for the price. Obviously though it's not what you want, if you don't want the wild fisheye distortion.

[Horncastle]

The Peleng is a full-frame fisheye on 35mm still film. It will actually project a full 180-degree field of view within a circle on the film, black edges around it and all. Because the GH1 has a frame more the size of 35mm movie film, you don't see all those edges. With the 2x digital zoom on, it looks pretty much like a wide angle lens.

Other wide angle lenses will be more "rectilinear", where they try to maintain the square edges that you want. The Peleng doesn't do that, but it's crazy wide for the price. Obviously though it's not what you want, if you don't want the wild fisheye distortion.

Yes, I was aware the Peleng is used for 35mm. :) Presumably it's PL mount and you have an adapter?

Actually, above we were talking about the Olympus 8mm Fisheye for 4/3 format. It also has a lot of distortion and reading the blurb about the lens it seems they haven't tried to optimize to get rid of the curvature. The three zooms have much less distortion.

[Barry_Green]

No, my Peleng 8mm is direct Nikon mount or M42 mount. The PL-mount versions are far more expensive.

[PhilD]

Other wide angle lenses will be more "rectilinear", where they try to maintain the square edges that you want. The Peleng doesn't do that, but it's crazy wide for the price. Obviously though it's not what you want, if you don't want the wild fisheye distortion.

Yes I figured I can easily distort a wide angle image in post to get the fisheye effect (I lose some resolution but thats OK), but it's hard to take a fisheye photo and make it rectilinear...

Olympus 9-18mm looks good. I also found out that a store near where I live has it for hire. I just need to get the Four Thirds adapter.

[Horncastle]

Hello,

After watching this video (http://www.vimeo.com/5287593) I want a 7mm lens without paying one thousand dollars. I'm sure it's possible for less than 100$. I don't care about losing the 8mm to 13mm range and autofocus. I've heard that there are both 7mm lenses around the same size as micro four thirds, and 3.5mm surveillance camera lenses for 10 bucks (if it's the same multiplication factor as Canon FDs on Micro Four Thirds, then it should be around 7mm on the GH1).

The question is, what lens and what adapter?

Thanks!

By the way, if you are still thinking of c mount 16mm or industrial lenses, none of the wide angle ones I know of will cover the 4/3 format. They generally almost or just about cover at 25mm focal length (usually with just a little vignetting) while coverage gets better on the longer lenses. Also, focal length of a lens remains the same whatever format you put it on, it's the field of view that changes. This means that a 3.5mm CCTV lens would still be a 3.5 mm lens on the GH1 (and would give you a little wide angle circle of view in the middle of your black frame).

[Horncastle]

Yes I figured I can easily distort a wide angle image in post to get the fisheye effect (I lose some resolution but thats OK), but it's hard to take a fisheye photo and make it rectilinear...

Olympus 9-18mm looks good. I also found out that a store near where I live has it for hire. I just need to get the Four Thirds adapter.

That's great - you can try it out without buying:). You don't need an adapter to put a 4/3 lens on a GH1. EDIT - YES YOU DO - sorry for wrong info.

[yslee]

For photos, it is possible to de-fisheye an image to get a rectilinear output. In fact prior to releasing wide-angle DX lenses Nikon Capture had an option to de-fisheye images taken with the 10.5mm DX fisheye. I have no idea if such steps exist for video.

To Phil: $100 for a 7mm lens? Um, I don't think that's possible, especially if you're looking for something with a more modern optical formula to better suit the GH1.

[Illya Friedman]

Olympus 7-14mm. Around $1700!!!. Seems to be a great lens. No metadata for removing distortion.

FWIW, I've heard now from 3x respected lens people that this is probably (one of) the finest zoom lenses avilable for still photography in ANY format. Except I thought the lenses retailed for over $2600!

[Illya Friedman]

FWIW, I've heard now from 3x respected lens people that this is probably (one of) the finest zoom lenses avilable for still photography in ANY format. Except I thought the lenses retailed for over $2600!

Ooops.. Just realized, the lens I keep hearing good things about is the Olympus 35-100 T2.0

[SpecialEdFX]

For photos, it is possible to de-fisheye an image to get a rectilinear output. In fact prior to releasing wide-angle DX lenses Nikon Capture had an option to de-fisheye images taken with the 10.5mm DX fisheye. I have no idea if such steps exist for video.

To Phil: $100 for a 7mm lens? Um, I don't think that's possible, especially if you're looking for something with a more modern optical formula to better suit the GH1.


After Effects has distortion correction. You can even reduce fringing!

[yslee]

That's neat. But ouch, AE isn't cheap.

(sorry, just starting to dabble into video, and everything is 2x to 10x the price of photography stuff)

[timbook2]

Peleng 8mm. Around $300 on ebay. You can get it in Nikon or M42 mount and use adapters to your M4/3.

In fact, I have one of them, and I might try it out on my GH1 just to see what it looks like... :evil:

Barry,
Thanx for the quick test move up and down the porch :-) So I gather this was without zoom factor and still gives extremely round fisheye-type images....@16mm hmmm with zoom = 32mm and were back to square1...

thats not going to be my wide angle lens then.