Lens Comparison

[sheldond 0]

Just wondering what everyone uses for a wide angle lens? My TRV-38 came with a .42 wide angle lens. I haven't used it yet, as I don't have a camera helmet yet. What does everyone else use? Should I consider a different size? Does anyone have any screen shots to illustrate what a .3, .42, .47. .5 & .7 look like?

[BETO74 0]

.42 is Ok I use .3 to do free fly go to Diamond lens web page you can see the difference or click on the banner on top of this page way cool ind... they also show pictures I guess it depends what you want to do with it.

Later

http://web.mac.com/ac057a/iWeb/AC057A/H0M3.html

[quade 4]

Depends on who manufactered the lens. Even then, there have been instances where one manufacturer has been inconsistant in the labeling of the strength.

Just to give you an idea of how wackey it gets, I have a "Sony" 0.6 that is much, much wider than a "Titanium" 0.42.

Further, placing a lens on different cameras -can- have different results depending on how the manufacturer of the camera designed camera lens and how large the imager of the camera is.

Your best bet, until you have some experience at this, is to beg or borrow lenses from other camera flyers and try them on your camera.

quade -
The World's Most Boring Skydiver

[XDV 0]

does someone find a web site to compare lens quality for photography

[quade 4]

Lenses for photography are pretty good and usually you won't put a wide angle lens on the front of those.

quade -
The World's Most Boring Skydiver

[AlvaroCarvalho 0]

Try these:

• X-Dream Optics

• Way Cool

• Royal Lens

See ya!

Ops...you said photography? Sorry...try this one then:

• Fred Miranda

Hey...ho...let's go!

[randolf 0]

For best price, http://www.flyers-pit.com/
Diamond .3 and Flyers-pit .3@are exactly the same product.

[XDV 0]

I was talking about photography lens comparaison,

for Canon 10D... not for video

thks for your help

[Deuce 1]

I did some comparisons in this thread:

http://www.dropzone.com/cgi-bin/forum/gforum.cgi?post=404973;search_string=diamond;#404973

[jmfreefly 0]

Just checked your other thread, and wanted to mention something that came up on the other thread.

Someone asked why there was vinetting (sp?) from the still picture, but it doesn't show up on video.

The answer is (I believe):

Still pictures use all the pixels on the CCD

Video only can use so many pixels (that corresponds to NTSC, or PAL). So what does it do with the other pixels that it has in there? Why image stabilization, of course!

On the sony cameras that have steady shot (not the optical stabilization like on the TRV-900), the camera basically moves the frame around on the CCD to 'stabilize' the image.

Additionally, if you are looking at the image on a normal TV, often 10% or so of the image (top/bottom, left/right) is cropped by the plastic around your picture tube. Sometimes this hides vinetting (sp?).

j

[mr2mk1g 10]

That makes sense - I noticed the other day that if I pan rapidly with a wide angle lense fitted, I see a sliver of the vignette for a seccond or so. I guess this must be the image stabalisation do-hickery kicking in.

[jmfreefly 0]

yep, most likely. the frame probably reached one side of the chip (and hence can then see the side of the lens). Usually people don't notice that because the pan itself is distracting enough.

When I first started shooting video and playing with NLEs, I noticed the black corners would dance around on lenses where you could see the corners.. I scratched my head at that for a while, until I remembered how the steady shot works on these cameras.

Again, the optical stabilization (like trv 900 and its sucessor (??)) works differently.

[mickhardy 0]

Randolf, How do you know the http://www.flyers-pit.com/ .3 lens is the same as the http://www.royal-lens.com/paymentinfo.html .3 lens? There is a reasonable price difference ($45USD) and I'm about to buy one of them.

[WayCool 0]

Mick it might be a good idea to talk to me before going overseas for these lenses.

Stay Cool
http://www.waycool.com.au

[randolf 0]

I had the same question as you did. I asked around people, including the guy who runs www.flyers-it.com.
They said that they are from the same manufacturer. Diamond .3 was first introduced at the price US$140 but raised it afterwards. I think because there wasn't anybody selling it. After I got the Flyers-pit lens and compared with my friends' diamond .3, I couldn't find any difference.It's 100% same.