Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie
Hi all! We have been experiencing an issue on site where threads have been missing the latest postings. The platform host Vanilla are working on this issue. A workaround that has been used by some is to navigate back from 1 to 10+ pages to re-sync the thread and this will then show the latest posts. Thanks, Mike.
Hi there,
There is an issue with role permissions that is being worked on at the moment.
If you are having trouble with access or permissions on regional forums please post here to get access: https://www.boards.ie/discussion/2058365403/you-do-not-have-permission-for-that#latest

Adaption lenses for Canon powershot A700

  • 29-04-2009 12:32am
    #1
    BrokenArrows
    Registered Users, Registered Users 2 Posts: 7,498 ✭✭✭


    Ok so i recently dug out my old A700 after not using it for years. Decided to get back into photography a bit.

    Anyway im not interested in buying a new camera just yet but i would like some extra zoom. Currently the a700 gives 6x optical and 6 megapixel which is pretty decent.

    Im not sure what the advantages and disadvantages are of using telephoto lenses. Can someone enlighten me.

    This ebay item has a 2.0x converter
    http://cgi.ebay.co.uk/Tele-Conversion-Lens-for-Canon-A700-A710-A720-IS-58mm_W0QQitemZ280330599534QQihZ018QQcategoryZ30077QQtcZphotoQQcmdZViewItemQQ_trksidZp1713.m153.l1262

    I also noticed that it says in the description that it " decreases the intensity of the light reaching the sensor by the factor of 4 as well as the resolution (by the factor of 2)."

    Do all lenses have this downside?


Comments

  • #2
    BrokenArrows
    Registered Users, Registered Users 2 Posts: 7,498 ✭✭✭BrokenArrows


    any ideas?


  • #3
    melekalikimaka
    Moderators, Education Moderators, Music Moderators Posts: 10,686 Mod ✭✭✭✭melekalikimaka


    BrokenArrows wrote: »
    any ideas?

    most cheap lens do... more zoom usually means less light.

    the converter will be 'alright' if stuff is well lit, but anything remotely dark... the convertor will start killing you that way. x6 zoom is huge tbh, cant see why you would need more unless your a peeping tom :D


  • #4
    BrokenArrows
    Registered Users, Registered Users 2 Posts: 7,498 ✭✭✭BrokenArrows


    melekalikimaka wrote: »
    ......x6 zoom is huge tbh, cant see why you would need more unless your a peeping tom :D

    dammit ive been found out. haha.

    nah just looking for something different.

    ok so it cuts out the light which is fair enough but why would it reduce the resolution.


  • #5
    melekalikimaka
    Moderators, Education Moderators, Music Moderators Posts: 10,686 Mod ✭✭✭✭melekalikimaka


    BrokenArrows wrote: »
    dammit ive been found out. haha.

    nah just looking for something different.

    ok so it cuts out the light which is fair enough but why would it reduce the resolution.

    nope still hitting the same sensor, might get some vingetting, a kinda black halo around the image from light fall off, but image quality will be effected...


Advertisement