Macro lens

[tecrec]

Hi all,
Could someone help explain the following,
Is there any difference between surface macro lens and u/w?
Can a surface macro lens be attached to a housing and used directly u/w?
If there is a layer of water between the macro lens n the main camera case would it affect the focusing?

I know a macro lens helps to magnify things but does that mean we have to be close to the object or can we still use the zoom feature?

Thanks all who answer

 

[beivied]

the forum is always pretty quiet on weekends, so i try to answer you la hor, before the experts come in

so called uw lenses, are wet lenses, can touch water ;p basically the attachment is by the screw thread on the uw housing. from my own reasoning, no you are not able to attach a land macro lens on the uw housing and use it, even if you have the same threading (dry lens usually dun have threading right??) you are going to flood the lens and spoil it

yes you can use dry lenses, if you are using slr setup. you need to buy ports. some prosumer cameras, like olympus c5060, can attach the olympus wide angle lens and port.

water medium is fine, no problem with focussing on that. for wide angle, land wide angle lens with a dome port is very good, cutting out the water medium and the dome port gives 180 degrees coverage.

macro lens, working distance is short. you can still zoom in further if you want. but that is within the short working distance.

if you are using a slr setup, you probably wouldnt be looking at wet lenses, esp macro lens.

 

[siaoon]

err.. are u refering to close up filters? or those prosumer macro lenses (is there is)? or talking abt SLR macro lenses?

 

[tecrec]

I'm using olympus C770. Correct me if i'm wrong, I was juz tinking since marco lens is juz a piece of convex lens, screwing it onto my underwater casing might work right? :sweat: