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rui_wang3

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Posts posted by rui_wang3

  1. <p>I looked at the DK-20 rubber eyepiece. It seems it is not designed for the DK-20C dioptic lens--it fit but very tight. See the link below, click on link 'comment'.<br>

    "I was reading some other reviews that said the Diopter won't allow you to use the rubber eye cup. Well my D5100 uses the DK-20 eye cup. which is very common. Its a snug fit but it will work."<br>

    http://www.amazon.co.uk/Nikon-DK-20c-Eyepiece-correction-selected/dp/B00009R8TO#customerReviews<br>

    The DK-20 eyecup is very cheap so I guess I will buy one. <br>

    I wonder if there's one specifically made for DK-20C dioptic lens.</p>

  2. <p>I own a Nex 3N and I use a number of legacy lenses (the kit lens, 16-50mm, is not sharp nor fast) with adapters. (M42 screw mount, Canon EOS mount, Konica, Contact/Yashica).<br>

    The Sony A7 just came out and I plan to buy one when the price goes down. If I use my legacy lenses with adapters, I should be able to get full-frame image without dark corners, right? Has anyone tried a7 yet?<br>

    Thanks in advance.</p>

  3. <p>The reason I need to see clearly is that I don't like the kit lens (16-50mm) due to its distortion. So I ended up manual focusing a few Canon, Takumar, Vivitar, Tokina, and Yashica lenses on my Nex 3. Focus peaking works well, but I prefer 100% zoom for accurate focusing. When the sun is strong, it is difficult to see.</p>
  4. <p>Okay, one more piece to add. My Tokina RL version is very susceptible to flare compared to modern lenses. Make sure you use a proper 49mm lens hood (that is designed for 28mm lens, or it will leave dark corners) or use you free hand while shooting into bright light sources.</p>
  5. <p>This thread is old but I would like to chime in. I just bought a brand new Tokina 28mm F2.8 SL lens (Contax Yashica mount). I used an adapter and tested it on my Canon 5D Mark II against my Canon 16-35mm F2.8II. (tripod, shutter release cable, 10x liveview manual focus, wall chart)<br>

    Canon has better corner sharpness at all tested apertures (2.8, 4, 5.6, 8). Center sharpness is about the same at 2.8 and 4. At 5.6 Tokina is slightly sharper. At 8 Tokina is sharper than Canon at the center.<br>

    Canon has a lot more distortion at the corner. Overall I would sayTokina is better than Canon optically, due to Canon's egregious distortion at the corners.</p>

  6. <p>I received the lens today! Very solid lens. I tested with my Canon 5D II. At 2.5/2.8 it is probably not as sharp as my Zeiss 135/2.8 or Tamron 90/2.8, or Canon 70-200mm F2.8 II, but it is sharp enough. Color and contrast are both very good.<br>

    It is very compact--much smaller than Zeiss 135/2.8. I am very happy with my purchase!</p>

  7. <p>Thanks for your advice! I tested with my tripod (with only 1 leg) and it worked wonderfully manual focusing under Live View. <br>

    Tripod is good but some public places ban tripods. And it does take longer to set up a tripod.<br>

    My tripod (with only 1 leg) stabilizes the image on the sensor a lot, even at 10x magnification. I can manual focus no problem. I need to use extra care though, so the camera does not move back and forth horizontally.</p>

  8. <p>No, not event, just ordinary portrait. I certainly can use a tripod. However, I wonder if a monopod will be equally effective in holding the camera steady for liveview manual focusing.<br>

    I just need to keep the camera steady so I can manual focus under liveview using a 135mm/f2.8 lens at 10x magnification.</p>

  9. <p>I use a Canon 5D II and have a few manual focuses lenses for portraiture. For critical focusing I prefer liveview with 10x zoom. To keep the camera steady under liveview (so the image does not wobble), which is a better tool? A tripod or a monopod?<br>

    A tripod is stable but it takes too much time to adjust (3 legs). Has anyone used monopod + liveview? What is your experience? I am thinking about investing in a monopod if it works with liveview. </p>

  10. <p>Thank you for your replies! I will give Nikon 105/2.5 a try. I will spend more on a good copy off Ebay.<br>

    I have used Nikon 50/1.4D and Zeiss 135/2.8 on my 5D II without any metering problem, and the focus confirmation works well. (Both adapters have focus confirmation.) When I buy Nikon lenses, I always look at lenses with aperture ring so I can use them on my Canon.</p>

  11. <p>I can get it for around $120 off Ebay. Is this lens worth owning? I am debating between 105/2.5 and 85/1.8D. The latter cost more than $300 used. I am buying this for portraiture. I already own a 50/1.4D.<br>

    I am a Canon shooter. I am buying this lens for my wife's Nikon D3.</p>

  12. <p>My 85/1.8 no longer focuses accurately. Micro adjustment on 5D II does not work, as focusing error is not consistent. By focusing manually I still get very sharp images. <br>

    The lens is 8-year old and I loaned it to a friend for a few months (but I don't think he damaged the lens or anything). I wonder if anyone experienced similar problem with this lens. Probably it is time to replace it?</p>

  13. <p>I use 5D II and I bought a 3rd party battery because I use a battery grip that takes 2 batteries. The 3rd party battery was made in Korea. It holds less power than Canon battery but it is working and I have no problem with charging it using Canon battery charger.<br>

    I agree with Bob. You may need to buy a separate battery charger for your 3rd party battery.</p>

  14. <p>Thanks for your responses! I recently gave my T3i to my dad so I have only a 5D II. I am looking to buy a compact DSLR. K-5 seems to be reasonably priced and better built. I am debating between getting another Canon or K-5. I read a lot of nice things about K-5.</p>
  15. <p>I have been a Canon shooter for years. I heard so many nice things about Pentax K-5's ergonomics features. With the price dropping, I wonder if I should give it a try. Have you used both Pentax and Canon (I use 5D II)? Is Pentax really better?</p>
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