Oly 45mm + C-180 teleconverter

Discussion in 'Accessories' started by jasjb, Feb 1, 2015.

  1. jasjb

    jasjb Mu-43 Regular

    52
    Mar 28, 2014
    So I found this website

    Stating "Originally made of the old filmcamera IS 1000, coincidently it works very well with several current m43 lenses. And I mean VERY WELL!"

    Does anyone have any real world examples with this lens?




    P1060714.
     
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  2. wjiang

    wjiang Mu-43 Hall of Famer

    I'm slightly sceptical as to what really well means... I've got a TCON-17 that works reasonably well but is kind of huge. The C-180 has a small exit pupil and smaller front element (see http://www.cs.mtu.edu/~shene/DigiCam/User-Guide/FZ-30/Converters/Other-Lenses/Oly.html) so I suspect it would lead to light loss and vignetting.

    Edit: I just measured the 45mm front element, it is about 26mm in diameter. Contrast this with the C-180 which has a rear element of only 18mm in diameter!
     
  3. wjiang

    wjiang Mu-43 Hall of Famer

  4. jasjb

    jasjb Mu-43 Regular

    52
    Mar 28, 2014
    Ah some good points wjiang :)

    I've sent Geemone a message, hopefully he can help with some more samples
     
  5. Geemone

    Geemone Mu-43 Regular

    64
    Aug 9, 2014
    Germany
    Hi

    In the thread you've mentioned:

    https://www.mu-43.com/showthread.php?t=16610&page=371&p=686696#post686696

    I do show a real live example of what is possible with this converter.
    Here in Germany it has become pretty popular amongst M43 users lately ince coincidently it works great with several lenses. I mainly use it with my Olympus 45 1.8 but it also works great with my Panasonic 100-300 on the long end. Iknow of people who use it with various M43 lenses with grat results. Bottom line, when it's workling with a particular lens, results are razor sharp without vignetting or distortion.

    Here's a link to a thread in a german forum with many examples. If you're not familiar with the language use an online translater...

    http://www.dslr-forum.de/showthread.php?t=876497&page=49

    (you'll have to browse through several pages)
     
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  6. wjiang

    wjiang Mu-43 Hall of Famer

    Interesting examples, no significant vignetting problems, but some mention of C/A and edge sharpness loss. Did anybody check out how much total light transmission loss there was?
     
  7. Geemone

    Geemone Mu-43 Regular

    64
    Aug 9, 2014
    Germany
    I didn't notice any significant light loss.
    And you should not forget that this is a converter you can get for under $ 10.00 at ebay so please do not expect it on an Oly 45 to be as good as a $1000.00 75/1.8 . But I find it nearly as good, which means a lot considering the price. In summary. I think one can't do anything wrong getting it.
    But be aware, when this "insider tip" startet to make the round in Germany, prices for the converter on ebay exploded to sometimes almost $100.00 and in the meantime they are hard to get. Best bet ist to look for a used IS-1 oder IS-1000 camera. Often they come with the converter and cost next to nothing...
     
  8. Geemone

    Geemone Mu-43 Regular

    64
    Aug 9, 2014
    Germany
    By the way... next time you copy images from my blog and post them publicly, please ask for my permission first... !
     
  9. wjiang

    wjiang Mu-43 Hall of Famer

    The fact that it is much smaller than the TCON-17 makes it pretty attractive. Shame it's such a pain to get this sort of thing to my country.
     
  10. emorgan451

    emorgan451 Mu-43 Veteran

    Hi, this is fairly interesting to me since I have the 45 1.8. I'm a little fuzzy on the way that teleconverters affect the lens that they're put on. The way that I currently understand is that putting this on effectively makes the lens a ~75 mm focal length. The lens then would act like a 75 f3 ish since you lose about 1.5 f stops with a 1.7x converter due to the apparent diameter of the front lens element. Putting the tc on changes the focal length portion of the equation (apparent diameter = focal length x f stop) and the lens apparent diameter stays the same so the effective f stop has to change. Where I'm fuzzy is wondering if this means it's a 75 f3 from field of view and depth of field only, or is it now an f3 from light gathering and shutter speed as well? Also if my understanding of how it works is off please correct me. I would like to learn.

    My other question is if the above is true would my 40-150mm f4-5.6 would be just as good wide open at 75 mm...
     
  11. aremesal

    aremesal Mu-43 Regular

    26
    Jan 21, 2013
    Zamora, Spain
    A.Remesal
    Geemone by the way, like so much that wrist strap (the one you use on your GM5), where is it from? Thanks :)
     
  12. Darren Bonner

    Darren Bonner Mu-43 All-Pro

    May 1, 2013
    Poole UK
    Manage to get one of these on Ebay, though it was worth a punt, I'm just waiting for the step up and step down rings to be delivered so I can try it out on my O45 and P100-300.
    Yesterday I attached to to my P45-150 as that has a 52mm filter thread. I thought it worked okay, when you are going to add extra glass in front or behind the lens, you are always going to loose a bit of resolution unless you pay top money for high quality glass, but I am pleased with the results for what I paid for this. There is a bit of vignetting especially at 45mm when used with this lens.
    Here are my pics.

    16503408906_83714921c9_b. Olympus C-180 TC test by Darren Bonner, on Flickr

    16527695371_73855f8a6c_b. Olympus C-180 TC test by Darren Bonner, on Flickr

    15906825774_eb9309dba3_b. Olympus C-180 TC test by Darren Bonner, on Flickr

    16528475082_e98ba55320_b. Olympus C-180 TC test by Darren Bonner, on Flickr

    16528444632_cb3540c58d_b. Olympus C-180 TC test by Darren Bonner, on Flickr

    16343543497_7afb5ac8b3_b. Olympus C-180 TC test by Darren Bonner, on Flickr
     
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  13. pinoyborian

    pinoyborian Mu-43 Veteran

    210
    Oct 3, 2012
    Peterborough UK
    Jerry Sisican
    Thanks to this thread, I bought one which arrived today. Planning to use it on the Oly 45mm. I did a quick a quick test on the O12-50 and I am very happy with the result at 45mm. I ordered step rings for use on the O45 and S60, which will take a while to arrive from China. Can't wait to try
     
  14. Darren Bonner

    Darren Bonner Mu-43 All-Pro

    May 1, 2013
    Poole UK
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  15. pinoyborian

    pinoyborian Mu-43 Veteran

    210
    Oct 3, 2012
    Peterborough UK
    Jerry Sisican
    As Darren suggested, here's two pics of my son from about 3ft distance, first with only the 45mm and the second with the C-180 handheld in front of the lens. I'm liking it already.

    91dfc6e6f1e7d681099365be1a4d9973.

    477c05e75934b29d37827402454d514d.

    Both photos OOC transferred directly from E-M10 to my LG G2 smartphone.
     
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  16. jssaraiva

    jssaraiva Mu-43 Regular

    155
    Jan 26, 2013
    Porto, Portugal
    José Saraiva
    Hi,

    Can you please share the aperture/shutter speed/ISO on the two photos? To understand if it really loses 1.7x of speed/aperture. Thanks!
     
  17. pinoyborian

    pinoyborian Mu-43 Veteran

    210
    Oct 3, 2012
    Peterborough UK
    Jerry Sisican
    I took both shots in Aperture priority at f/1.8. However:

    Photo 1 (45mm only) = 1/100s, ISO2000
    Photo 2 (w/ 1.7x tc) = 1/77s, ISO 3200

    Sorry but I'm not techie enough to explain further. Took both photos as quick snapshots but trying to make it as sharp as possible.
     
  18. jssaraiva

    jssaraiva Mu-43 Regular

    155
    Jan 26, 2013
    Porto, Portugal
    José Saraiva
    Thanks!

    I'm no expert also, but a "usual" (between the body and lens) 1,7x TC should loose 1,5 stops. According the data you've provided, my calculations would say it losses circa 2 stops, but exposure and lightning may vary from shoot to shoot.

    José
     
  19. barry13

    barry13 Super Moderator; Photon Wrangler

    Mar 7, 2014
    Southern California
    Barry
    I believe 1/100 to 1/77 is about 1/2 a stop (1/50 would be a full stop)
    ISO2000 to 3200 is a little over 1/2 a stop (4000 would be a full stop)

    ~1/2 + ~1/2 = ~1 stop.

    right?

    I don't think the way an inline TC works is the same as one that goes in front of the lens, in terms of light loss...

    Barry
     
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  20. dweller

    dweller Mu-43 Veteran

    378
    Sep 14, 2012
    London, UK
    I also got one of these cheap teleconverters.
    It loses about a stop of light on the Oly 45mm.
    Also loses sharpness and catches flare. Not sure whether I'll use it that much.
    It vignettes badly on some lenses like panasonic 20mm.
    On a positive note its light weight means you can chuck it in the camera bag just in case.

    this shot was in low light with 45mm 1.8 and has been processed in LR so the vignette is fake.
    16377052790_2ab5b43f16_b. robin by dweller88, on Flickr
     
    Last edited: Feb 19, 2015
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