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  1. #11
    Join Date
    Dec 2007
    Posts
    2,562
    Thanks Don
    Sony A77
    Sony A580
    Sony A 100
    Maxxum 400si.
    Sony 18-70 Kit Lens
    Minolta AF 35-70
    Minolta AF 50 f/1.7
    Tamron 70-300 f/4-5.6 Di LD
    Tamron 60mm Macro
    Tamron 17-50 f/2.8
    Tamron 2x Converter
    Sony HVL-F42AM
    Quantaray 70-300 4.5-5.6 Macro
    Slingshot 200 Bag



    http://www.flickr.com/photos/22083244@N06/

    http://s305.photobucket.com/albums/nn219/sparkie1263/

  2. #12
    Join Date
    Nov 2008
    Location
    Monmouthshire, UK
    Posts
    2,152

  3. #13
    Join Date
    Feb 2006
    Location
    Des Plaines, IL
    Posts
    9,554

    Question Was it clear enough to be of any use

    Quote Originally Posted by sparkie1263 View Post
    Thanks Don
    Frank,

    I know I provided an answer, but is it adequately understandable?

    I mean, you have 'witnessed' the difference in the resultant exposure between the two types of lenses (Di/non-Di) when it comes to ADI interaction. I would say you definitely have an advantage with an ADI-equipped lens, and more so in Manual (M) mode, on the SONY. I mean, I did no more work than to simply change the lens and it "boosted" the flash compensation automagically.

    In a way, that was the entire intent of this exercise ... so that I could pit these two $150 juggernauts against one another and really test the "difference" between them and eliminate the apparent void in performance expectation.

    Initially, they are, for all intents, identical. Until you use the ADI feature and then they separate.

    I had hoped to see an improvement in the purple fringe between them and ... BUZZ! There is none to speak of. Focus seems identical ... but, I will perform that check at different focal lengths, later on.

    So, in the end (for the moment, at least), unless you use a flash ... the difference between between this non-Di and the Di lens is pretty much ... nil. Oh, except for the $30 extra the Di usually costs.
    Don Schap - BFA, Digital Photography
    A Photographer Is Forever
    Look, I did not create the optical laws of the Universe ... I simply learned to deal with them.
    Remember: It is usually the GLASS, not the camera (except for moving to Full Frame), that gives you the most improvement in your photography.

    flickr & Sdi

  4. #14
    Join Date
    Dec 2007
    Posts
    2,562
    Are there any other settings you have to change? Is this the same for all 8 pin lenses? I will have to try it to see how it works. I think I understand it.
    Thanks
    Frank
    Sony A77
    Sony A580
    Sony A 100
    Maxxum 400si.
    Sony 18-70 Kit Lens
    Minolta AF 35-70
    Minolta AF 50 f/1.7
    Tamron 70-300 f/4-5.6 Di LD
    Tamron 60mm Macro
    Tamron 17-50 f/2.8
    Tamron 2x Converter
    Sony HVL-F42AM
    Quantaray 70-300 4.5-5.6 Macro
    Slingshot 200 Bag



    http://www.flickr.com/photos/22083244@N06/

    http://s305.photobucket.com/albums/nn219/sparkie1263/

  5. #15
    Join Date
    Jun 2008
    Posts
    2,204
    Quote Originally Posted by sparkie1263 View Post
    Are there any other settings you have to change? Is this the same for all 8 pin lenses? I will have to try it to see how it works. I think I understand it.
    Thanks
    Frank
    Could this be a reason why Frank's portraits with the 50mm F/1.7 Minolta with the flash do not come out correctly?
    flickr

    Canon 7D - 5D | 550EX - 430EX II - (2) PW FlexTT5 | 24-105 f4L | 70-200 f2.8L IS | 100 f2.8L IS | 50 f1.8 II

  6. #16
    Join Date
    Feb 2006
    Location
    Des Plaines, IL
    Posts
    9,554
    I would suspect and have to say that with the built-in "pop-up" flash, it is a significant possibility.

    I will do a Minolta 50mm f/1.4 (five-contact) vs SONY 50mm f/1.4 (eight-contact) test for just this purpose and see what comes out.
    Don Schap - BFA, Digital Photography
    A Photographer Is Forever
    Look, I did not create the optical laws of the Universe ... I simply learned to deal with them.
    Remember: It is usually the GLASS, not the camera (except for moving to Full Frame), that gives you the most improvement in your photography.

    flickr & Sdi

  7. #17
    Join Date
    Feb 2006
    Location
    Des Plaines, IL
    Posts
    9,554
    Okay ... after several shots with both 50mm lenses, the flash exposure results are ambiguous ... but, only with the SONY 50mm. The flash exposure is consistent with the Minolta lens.

    If I shoot a series of shots with the SONY 50mm, I can actually get an occasional shot which is actually quite a bit brighter than the rest. With the Minolta 50mm, every flash exposure is the same with no variation. So, what that means to me is I either have to clean my contacts on the A100 and the SONY lens, or that ADI is acting a little "iffy." Right now, I cannot trust it ... because it is either working or it is not, and without repeatability, the results are pretty much useless. I'll look into that a little later.

    Where is that darn A700?
    Don Schap - BFA, Digital Photography
    A Photographer Is Forever
    Look, I did not create the optical laws of the Universe ... I simply learned to deal with them.
    Remember: It is usually the GLASS, not the camera (except for moving to Full Frame), that gives you the most improvement in your photography.

    flickr & Sdi

  8. #18
    Join Date
    Dec 2007
    Posts
    2,562
    Wow I forgot you were doing all this testing wit the A100. This is a good thing for me. Good thinking Dr4gon.

    Frank
    Sony A77
    Sony A580
    Sony A 100
    Maxxum 400si.
    Sony 18-70 Kit Lens
    Minolta AF 35-70
    Minolta AF 50 f/1.7
    Tamron 70-300 f/4-5.6 Di LD
    Tamron 60mm Macro
    Tamron 17-50 f/2.8
    Tamron 2x Converter
    Sony HVL-F42AM
    Quantaray 70-300 4.5-5.6 Macro
    Slingshot 200 Bag



    http://www.flickr.com/photos/22083244@N06/

    http://s305.photobucket.com/albums/nn219/sparkie1263/

  9. #19
    Join Date
    Jun 2008
    Posts
    2,204
    hmm ok thanks!
    flickr

    Canon 7D - 5D | 550EX - 430EX II - (2) PW FlexTT5 | 24-105 f4L | 70-200 f2.8L IS | 100 f2.8L IS | 50 f1.8 II

  10. #20
    Join Date
    Feb 2006
    Location
    Des Plaines, IL
    Posts
    9,554
    After I went back to the 70-300mm lenses, once again, the ADI was again repetitively effective with the subsequent exposures.

    It looks like it is going to be a trip to the SONY Style store, tomorrow, to do a comparison in store with their "on-the-shelf" SONY 50mm f/1.4 lens. It appears that I need to know if my own 50mm lens has a defect. Yes, it is one of the often suspect "China" productions. Man, if it isn't one thing, it is another. LOL ... not!

    Frank, as far as the Minolta AF 50mm f/1.7 is concerned, there is no ADI control ... so it is under your control , always. You should be able to make use of the manual mode. One of the things I have noticed with that particular lens and the A100, is that AUTO mode may help reveal the settings you need to get a decent pop-up flash shot. Work with it and see if you can see the difference. While the pop-up with a five contact lens is limited ... AUTO offers an more evaluative method to make it work.
    Last edited by DonSchap; 01-24-2009 at 03:02 PM.
    Don Schap - BFA, Digital Photography
    A Photographer Is Forever
    Look, I did not create the optical laws of the Universe ... I simply learned to deal with them.
    Remember: It is usually the GLASS, not the camera (except for moving to Full Frame), that gives you the most improvement in your photography.

    flickr & Sdi

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