User Tag List

Page 62 of 94 FirstFirst ... 12 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 ... LastLast
Results 1,038 to 1,054 of 1584
  1. #1038
    Regular Member
    Join Date
    Jan 2004
    Location
    Hong Kong
    Posts
    6,527
    Post Thanks / Like
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)

    Default

    I had bought Sigma Apo, Tamron, and Tokina lenses but ended up selling them or giving them away. The expensive Sigma Apo had its coatings turning cloudy and fogging all the glass elements and became unusable, which I had to throw away. The most expensive part of a lens is in the precision focussing mount, not so much the glasses. That is why brand name lenses are heavy and more a pain to carry around. They also can stand the test of time, weather, moisture, dust, etc.

  2. #1039
    Regular Member
    Join Date
    Aug 2007
    Location
    Jakarta & Auckland
    Posts
    349
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    Hi Taneepak, Sorry I don't quite understand regarding the focussing mount is the most expensive. But to my knowledge, I would say the glass & built quality are the most expensive part of lenses. Also the faster lenses (bigger aperture) thus bigger glasses will make the price increase astronomical... the Sigma you have, I think its not the coating turn cloudy.. normally thats because it grow fungus on the glass thus make it look cloudy

  3. #1040
    Regular Member red00ecstrat's Avatar
    Join Date
    Sep 2003
    Location
    Hong Kong S.A.R. China
    Posts
    1,985
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    Quote Originally Posted by taneepak View Post
    I had bought Sigma Apo, Tamron, and Tokina lenses but ended up selling them or giving them away.
    Really? Have they ever made any lens for Leica and Rollie cameras?

    Anyway, I have to agree with taneepak this time. In terms of manufacturing or optical quality. No doubt, those originals are indeed better than those made by third party companies. Also, German made lenses are better than Japanese made lenses. I know, coz I'd made compairison between them in the past when I was young and green.
    But I always think equipment isn't the key of getting "quality" pictures. In fact, it's all up to the one who use it!
    So, just keep shooting!

  4. #1041
    Regular Member
    Join Date
    Aug 2007
    Location
    Jakarta & Auckland
    Posts
    349
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    Quote Originally Posted by red00ecstrat View Post
    Have u guys ever tried shooting infrared film in the past? Never? Doesn't matter! Now we will be able to achieve the same effect pretty easily with a little digital point and shoot camera! Why using a digital P&S rather than using a dslr? Check this out! http://www.nature-photography-centra...otography.html
    Have fun! And I hope u guys will post some of your infrared photos here in the future!
    Hi Red, thanks for the link. I know IR photography before this but still learn few bit and tips from the link lol I now find it quite amusing looking at my remotes from camera LCD >.< By the way the part I dont understand why the instruction say to use custom WB when the shooting taken in RAW ? I thought only ISO affecting RAW.. WB and the rest is only if saved as jpg or any other than RAW?

  5. #1042
    Regular Member red00ecstrat's Avatar
    Join Date
    Sep 2003
    Location
    Hong Kong S.A.R. China
    Posts
    1,985
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    Quote Originally Posted by ae86trueno View Post
    the Sigma you have, I think its not the coating turn cloudy.. normally thats because it grow fungus on the glass thus make it look cloudy
    Not exactly. Fungus is one thing. But as far as I know. Some of the elements that inside the lens tube was indeed made by gluing two different lenses. The glue will grow old from time to time. Because of that. The quality of our lenses will decline. Just the matter of time!
    Please correct me if i was wrong.

  6. #1043
    Regular Member
    Join Date
    Aug 2007
    Location
    Jakarta & Auckland
    Posts
    349
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    Quote Originally Posted by red00ecstrat View Post
    But I always think equipment isn't the key of getting &quot;quality&quot; pictures. In fact, it's all up to the one who use it!
    So, just keep shooting!
    the man behind the gun eh? :P yeah agree with that. I seen somewhere this is discussed to death... I agree regarding the man behind the gun but sometimes gears are quite important too.. example try taking badminton photo with 5.6 lenses.. the gear will be the limiting factor in this condition IMHO.

  7. #1044
    Regular Member
    Join Date
    Aug 2007
    Location
    Jakarta & Auckland
    Posts
    349
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    Quote Originally Posted by red00ecstrat View Post
    Not exactly. Fungus is one thing. But as far as I know. Some of the elements that inside the lens tube was indeed made by gluing two different lenses. The glue will grow old from time to time. Because of that. The quality of our lenses will decline. Just the matter of time!
    Please correct me if i was wrong.
    Thanks for the information Red, well I never knew regarding glueing 2 glass but if thats the case then yeah I guess what happened to Taneepak might be because of the glue. to think about it, won't glue degrade the light quality by alot? or is it special "glassy" glue that does not affect the light when passing through the glue?

  8. #1045
    Regular Member red00ecstrat's Avatar
    Join Date
    Sep 2003
    Location
    Hong Kong S.A.R. China
    Posts
    1,985
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    Quote Originally Posted by ae86trueno View Post
    won't glue degrade the light quality by alot? or is it special "glassy" glue that does not affect the light when passing through the glue?
    I don't know much about that glue ae86! Perhaps it's something specially made for gluing glass!

    Glad you've found that IR link useful!

  9. #1046
    Regular Member red00ecstrat's Avatar
    Join Date
    Sep 2003
    Location
    Hong Kong S.A.R. China
    Posts
    1,985
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default I wish I had a longer lens!

    Took that shot while having an interview with a guy!
    Attached Images Attached Images  

  10. #1047
    Regular Member red00ecstrat's Avatar
    Join Date
    Sep 2003
    Location
    Hong Kong S.A.R. China
    Posts
    1,985
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    Quote Originally Posted by ae86trueno View Post
    By the way the part I dont understand why the instruction say to use custom WB when the shooting taken in RAW ? I thought only ISO affecting RAW.. WB and the rest is only if saved as jpg or any other than RAW?
    I guess it will be much easier for us to handle and to obtain the IR effect that way.

  11. #1048
    Regular Member george@chongwei's Avatar
    Join Date
    Jul 2007
    Location
    MIA
    Posts
    29,916
    Post Thanks / Like
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)

    Default

    haha..ntg to do..
    so decided to snap some photos and playing with my camera.

    enjoy!
    Attached Images Attached Images      
    Last edited by george@chongwei; 09-03-2008 at 08:28 AM.

  12. #1049
    Regular Member george@chongwei's Avatar
    Join Date
    Jul 2007
    Location
    MIA
    Posts
    29,916
    Post Thanks / Like
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)

    Default

    hehe..carz frenzy..
    Attached Images Attached Images  

  13. #1050
    Regular Member ctjcad's Avatar
    Join Date
    Sep 2004
    Location
    u.s.a.
    Posts
    19,157
    Post Thanks / Like
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)

    Default ^^Whoah..^^

    ..George:
    - I thought in post #1048, you were trying to show the before and after pictures of what happened to the trees...and
    - your picture above, post #1049, was that taken in the parking lot of a car dealership??..

    *btw, still waiting for your vacation trip pics, you promised to post here for us...

    red00ecstrat (Stefan), i hope the interview didn't turn out to be a doozer..
    Last edited by ctjcad; 09-03-2008 at 08:50 AM.

  14. #1051
    Regular Member
    Join Date
    Jan 2004
    Location
    Hong Kong
    Posts
    6,527
    Post Thanks / Like
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)

    Default

    Normally a lens design has multiple elements, sometimes with one or two elements being cemented together. Each surface of each glass element, including the surfaces of cemented pairs, are given multiple coating layers to reduce flare. The layers of coatings can be as little as 2 to as many as 12. The Sigma Apo I had had most of the coatings turned greenish which clouded all the elements. I don't know why it happened.
    Every lens has to be mounted on a mount. The mount must hold every element coaxial and with the correct separations, irrespective of ambient temperatures. Many thin, steeply curved elements cannot easily be fixed in a lens barrel. The provision of a focusing movement, and for elements to move axially as in a zoom lens design, greatly increases both production costs and difficulties. These difficulties are made even bigger by having to take care of the auto diaphragm mechanism and its coupling to the camera body. If you use cheap and light material like aluminium only instead of brass and a little aluminium for the focusing mount, you may save some costs but at the expense of quality and reliability. Even assembling the elements unto the mount must be perfect. If not the best lens scheme is useless. It is like assembling an intricate high price swiss watch.
    For longer focal length lenses a long focusing mount, necessary for focusing near, is going to be heavy and expensive. Alternatively you can opt for a much shorter focusing mount, to cut down weight, length and costs, but this long focal length lens will not be able to focus very close up.

  15. #1052
    Moderator Oldhand's Avatar
    Join Date
    Nov 2005
    Location
    Asia
    Posts
    7,320
    Post Thanks / Like
    Mentioned
    10 Post(s)
    Tagged
    1 Thread(s)

    Default

    Quote Originally Posted by george@chongwei View Post
    haha..ntg to do..
    so decided to snap some photos and playing with my camera.

    enjoy!
    From the quality of the pictures, it's clear that you are, er, playing with the camera, george

  16. #1053
    Regular Member
    Join Date
    Aug 2007
    Location
    Jakarta & Auckland
    Posts
    349
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    Quote Originally Posted by taneepak View Post
    Normally a lens design has multiple elements, sometimes with one or two elements being cemented together. Each surface of each glass element, including the surfaces of cemented pairs, are given multiple coating layers to reduce flare. The layers of coatings can be as little as 2 to as many as 12. The Sigma Apo I had had most of the coatings turned greenish which clouded all the elements. I don't know why it happened.
    Every lens has to be mounted on a mount. The mount must hold every element coaxial and with the correct separations, irrespective of ambient temperatures. Many thin, steeply curved elements cannot easily be fixed in a lens barrel. The provision of a focusing movement, and for elements to move axially as in a zoom lens design, greatly increases both production costs and difficulties. These difficulties are made even bigger by having to take care of the auto diaphragm mechanism and its coupling to the camera body. If you use cheap and light material like aluminium only instead of brass and a little aluminium for the focusing mount, you may save some costs but at the expense of quality and reliability. Even assembling the elements unto the mount must be perfect. If not the best lens scheme is useless. It is like assembling an intricate high price swiss watch.
    For longer focal length lenses a long focusing mount, necessary for focusing near, is going to be heavy and expensive. Alternatively you can opt for a much shorter focusing mount, to cut down weight, length and costs, but this long focal length lens will not be able to focus very close up.
    Ah, now I understand more, thanks Taneepak. I just want to confirm what I understand is right, so given an identical lens say, its 100mm 2.8 glass with minimum focus 1meter. It will be more expensive if this lens become 100mm 2.8 with min focus 0.5meter compare to 100mm 1.8 with min focus 1meter?

  17. #1054
    Regular Member
    Join Date
    Aug 2007
    Location
    Jakarta & Auckland
    Posts
    349
    Post Thanks / Like
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    Quote Originally Posted by ctjcad View Post
    - your picture above, post #1049, was that taken in the parking lot of a car dealership??..
    either that or public parking... . I will drop dead if that is taken in his own garage

Page 62 of 94 FirstFirst ... 12 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 ... LastLast

Similar Threads

  1. alternative to YY BG-65
    By olli in forum Badminton String
    Replies: 20
    : 09-10-2012, 12:22 AM
  2. Alternative to MP 88
    By KaffiQ in forum Racket Recommendation / Comparison
    Replies: 16
    : 08-09-2009, 01:42 PM
  3. Help me for the best alternative
    By ice_dragon in forum Racket Recommendation / Comparison
    Replies: 4
    : 03-14-2009, 04:40 PM
  4. alternative for Winex Ti-6
    By rubenboogaard in forum Badminton Rackets / Equipment
    Replies: 1
    : 11-11-2007, 11:59 AM
  5. Alternative to BG-80/BG-85
    By Cricket in forum Badminton String
    Replies: 11
    : 03-10-2004, 05:31 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •