Jump to content

eosdoc

Members
 View Profile  See their activity

  • Posts

    1,516

  • Joined

  • Last visited

 Content Type 

Posts posted by eosdoc

    EOS 630 Remote Shutter Release Contacts

    in Canon EOS Mount

    Posted

    <code><i>

    Above, Julian mentioned fixing the contacts with silver or nickel conductive paint? Will this work? It seems like it would be a pretty easy/cheap solution.

    </i></code>

    <P>

    Cheap as in "paucity of effort". But not necessarily cheap as

    in "inexpensive". Think $30 or so, and possibly shipping for

    hazardous goods for some products:<BR>

    <a target=loser href=

    http://www.google.com/products?q=conductive+silver+paint

    >http://www.google.com/products?q=conductive+silver+paint</a><BR>

    <a target=loser href=

    http://www.dse.com.au/cgi-bin/dse.storefront/en/product/N5184

    >http://www.dse.com.au/cgi-bin/dse.storefront/en/product/N5184</a>

    <P>

    Painting a replacement pad is just that. You can use a grip

    accessories, but there will be no physical strength.

    EOS 630 Remote Shutter Release Contacts

    in Canon EOS Mount

    Posted

    The center contact is indeed <a title="FUBAR" target=loser href=

    http://en.wikipedia.org/wiki/FUBAR

    >ruined</a>. You could try to repair it

    with silver or nickel conductive paint that is used for circuit

    board repair. Or you could completely dismantle the 630 to

    hardwire the connections inside the shell. Next time, hack into

    the shutter-release grip instead of the body.<BR>

    <A target=loser href=

    http://eosdoc.com/manuals?q=GR30mod

    >http://eosdoc.com/manuals?q=GR30mod</a><BR>

    <a target=loser href=

    http://eosdoc.com/manuals?q=1000FN++

    >http://eosdoc.com/manuals?q=1000FN++</a>

    Digital Glass Filters

    in Canon EOS Mount

    Posted

    Canon used the term "meniscus" lens in 2003 to describe this technique, but the adspeak

    wording in Canon's press releases has gradually changed since 2004 from "lens element

    shape" "optimized for digital sensors", to the more recent "optimal lens shaping".

    <P>

    This is not limited to the supertelephoto or telephoto lenses. For example, refer to

    the EF-S 18-55 f/3.5-5.6 USM Technical report:<BR>

    <a target=loser href=

    http://www.canon.com/camera-museum/tech/report/200401/report.html

    >http://www.canon.com/camera-museum/tech/report/200401/report.html</a><BR>

    <Code>

    The EF-S18-55mm f/3.5-5.6 USM features lens shape and coatings optimized for its use

    with a digital SLR camera. As a result, the lens successfully realizes both appropriate color

    balance and minimization of the ghost and flare attributable to surface reflections from

    the imaging element.

    </code>

    <P>

    For more reading, try this google search:<BR>

    <a target=loser href=

    http://google.com/search?q=site:canon.com+%22surface+reflections%22&filter=0

    >http://google.com/search?

    q=site:canon.com+%22surface+reflections%22&filter=0</a><BR>

    Is it just the coatings? Or lens shape "optimized" for digital sensors?

    Digital Glass Filters

    in Canon EOS Mount

    Posted

    I thought that any flat glass filter would contribute to sensor

    reflection. See explanation in Figure 4 from Canon Camera Museum <A

    href="http://www.canon.com/camera-museum/tech/report/200308/200308.html"

    target=_blank>Technical Report 2003.8</A>

    <P>

    <CENTER><A

    href="http://www.canon.com/camera-museum/tech/report/200308/200308.html"

    target=_blank><IMG

    src="http://web.archive.org/web/20060517221136/http://www.canon.com/camera-museum/tech/report/200308/img/zu4.gif"></A></CENTER>

    <P>Do the "digital filters" undo the beneficial effects of a meniscus lens?

    <P>See also: <A href="http://thesybersite.com/minolta/sensor-reflection/"

    target=_blank>http://thesybersite.com/minolta/sensor-reflection/</A></P>

    Trigger 420EX via Wirelsss TTL in Manual?

    in Canon EOS Mount

    Posted

    My 420EX does NOT respond to fixed-power (i.e. manual) signals

    sent by wireless E-TTL.<P>

    If you have a <code>580EX II</code>, perhaps you could help update

    the chart at <a target=loser href=

    http://eosdoc.com title="EOS

    Documentation

    Project"

    >eosdoc</a>:<br>

    <A target=loser href=

    http://eosdoc.com/manuals?q=ETTLDx

    >http://eosdoc.com/manuals?q=ETTLD</a>

    <P>

    Have you tried tricking the 420EX into firing maximum power

    over wireless E-TTL using <a target=loser href=

    http://eosdoc.com/manuals?q=blindFEL

    >blind FEL</a>?

    <P>

    Alternatively, could you force the 420EX into full-power

    manual mode, and sync the 580EX II using an optical slave

    trigger?

    Computer connection recognition

    in Canon EOS Mount

    Posted

    Switch Communication Mode on the EOS 20D to [Normal] (and not

    [PTP]).<BR>

    Try using iPhoto to connect to the EOS 20D.<BR>

    Change the USB cable, in case the cable is faulty.<BR>

    Delete the [Canon CameraCom Pref] file and restart.<BR>

    Consult the "Troubleshooting" section on page M-64 and M-65

    of the instruction manual.

    Need confirmations something very simple

    in Canon EOS Mount

    Posted

    Some people actually do think of lenses that way, especially

    for stitching pictures. Use a good calculator for the

    answers:<BR>

    <a target=loser href=

    http://eosdoc.com/manuals?q=jlcalc

    >http://eosdoc.com/manuals?q=jlcalc</a>

    <P>

    To achieve the same field of view as my EF 24mm f/2.8

    mounted on my EOS Elan 7E with 35mm film, I would need

    to set my EF-S 10-22mm rectilinear zoom to 15mm on my

    EOS 20D.

    <P>

    For 95degree diagonal field of view, use:

    <table>

    <tr><th>Format</td><td rowspan=3></td><th>Focal<BR>length</td></tr>

    <tr><td>35mm</td><td>19.75mm</td></tr>

    <tr><td>EOS 20D</td><td>12.35mm</td></tr>

    </table>

    Loose zoom sleeve

    in Canon EOS Mount

    Posted

    If the lens is NOT 70-200EF, maybe it is one of Canon's <a

    target=loser title=

    "Canon

    Camera

    Museum" href=

    http://www.canon.com/camera-museum/camera/lens/ef/data/telephoto_zoom/ef_55~200_45~56_usm.html

    >55-200 mm</a> or <a target=loser title=

    "Canon

    Camera

    Museum" href=

    http://www.canon.com/camera-museum/camera/lens/ef/data/telephoto_zoom/ef_80~200_45~56_usm.html

    >80-200 mm</a> zoom lenses?

    <P>

    If the lens has a "twist-to-zoom" ring, there is a way to improve

    the friction. For good ideas, see:<BR>

    <a target=loser title="EOS

    Documentation

    Project" href=

    http://eosdoc.com/manuals?q=ZoomCreep

    >EOSDoc: Zoom Creep</a>

×
×
  • Create New...