Teleconverters in photography — Photography podcast #31

Pho­tog­ra­phy pod­cast #31 is all about tele­con­vert­ers. Tele­con­vert­ers are an appa­ra­tus that you put between the body of your SLR or DSLR cam­era and the lens. It then increases the effec­tive focal length of the lens on the cam­era. In this pod­cast we dis­cuss their advan­tages and disadvantages.

Thanks again to Norm for his com­ment on last week’s pod­cast reflec­tors in pho­tog­ra­phy.

New seg­ment again this week — PHOTO OF THE WEEK
This week, the pho­to­graph is by Zseike and I com­ment in the pod­cast on why I think this pho­to­graph is fan­tas­tic.
Image removed at Zseike’s request.

You can down­load this pho­tog­ra­phy pod­cast directly by click­ing first link or lis­ten to it almost imme­di­ately with the embed­ded player below the photographs.


  1. Mark Compton says:

    Just started lis­ten­ing to the pod­cast, started at the begin­ning and mak­ing my way through them, taken 2 days so far heh.. Lov­ing the pod­cast, great infor­ma­tion and it’s fuelling my love for pho­tog­ra­phy :)
    In quick response to Mike above, I think you were think­ing of exten­sion tubes, they don’t have glass in them, but they are gen­er­ally used for macro pho­tog­ra­phy to increase the mag­ni­fi­ca­tion by allow­ing you to move closer to the sub­ject. I got half way through this pod­cast and realised I was think­ing about exten­sion tubes ini­tially :)

    Cheers for all the info, and I’ll keep plod­ding through the casts, hope­fully I’ll be up to date in a day or two heh.

  2. Mike says:

    I stand cor­rected.
    I didn’t real­ize they did indeed have glass in them.

    Never mind.. .

  3. Mike says:

    Hi, I just heard this episode today, and wanted to point out that you kept refer­ring to these as “lenses”.
    And even made a state­ment about the “glass” in it at one point in the podcast.

    I would really hope you real­ize that tele­con­vert­ers are just empty tubes. They are not a lens! :-)


  4. Cindy says:

    Thanks Marko. Sorry I didn’t give you enough info on the cam­era I have or what I intended to use the tele­con­verter for. I’ve just upgraded to a Canon XTi and I love doing nature and land­scape pic­tures. Thank­fully you under­stood my ques­tion, and thanks for your insite on tele­con­verter lens. With a 1.4x11 I beleive I can finally get a good clear pic­ture of the hawk in his nest, with the lens I have. Thanks again Cindy

  5. admin says:

    Hey Daronj,

    Thx for the com­pli­ment!
    DOH! I neglected to put that in the pod­cast — EXCELLENT QUESTION.

    Your prin­ci­pal is cor­rect and your math is correct.

    Just for learn­ing pur­poses I would sug­gest it’s clearer to say 200 x 1.4 x 1.6 where 1.4 is the tele­con­verter fac­tor and 1.6 is the crop fac­tor for dig­i­tal SLR cam­eras with a crop fac­tor. same diff though, and THANKS for point­ing that out. Best! Marko

  6. daronj says:

    Hi Marko,

    Great pod­cast on tele­con­vert­ers. I have been con­tem­plat­ing these recently for nature pho­tog­ra­phy. I have a ques­tion. Doesn’t the DLSR’s image sensor’s crop fac­tor also add the the effec­tive length of the lens? I have a Canon Rebel XT with a 1.6 crop fac­tor. If a use a 200mm lens and a 1.4x con­ver­tor, do I get 200 x 1.6 x 1.4 for an effec­tive length of
    448 mm rel­a­tive to 35mm camera?


    Oh, I love the photo of the week. Great find.

  7. admin says:

    Thanks for those com­ments Rob and Al. You are right Rob…I used wicked too often when there are so many other syn­onyms out there.


  8. Rob says:

    Thanks for the clear and delib­er­ate expla­na­tion on how to use a tele­con­verter. I have been mulling about this deci­sion for some time now and I think your pod­cast will finally be the straw that breaks the camel’s back — in favour of adding one to my kit.

    If I could only make one sug­ges­tion, for future pod­casts obvi­ously, it would be a lin­guis­tic one: try not to overuse key words such as “wicked” since once repeated, it loses its orig­i­nal dis­tin­guish­ing value — in my hum­ble opinion.

  9. Al says:

    Thanks for this pod­cast! Being new to the art, I’m still explor­ing the tools and equip­ment, any equipment-related top­ics and tips would be great!


  1. […] Thanks as always for com­ments by‚Rob, Al, DaronJ and Cindy on our last pod­cast on pho­tog­ra­phy tele­con­vert­ers . Thanks very much to Sami­rah and Tegan, mem­bers of our pho­tog­ra­phy forum‚for their sug­ges­tions on future pod­casts. We LOVE com­ments and sug­ges­tions so please send more. You can down­load this pho­tog­ra­phy pod­cast directly by click­ing first link or lis­ten to it almost imme­di­ately with the embed­ded player below the photographs. […]

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