Hi Sury,
If your intention was to demonstrate the capability of your new adapter and Vivitar MD lens combo, then you have certainly shown that it is very capable of producing a great close-up. If you like doing close-up work and you have a good adapter, then there are some great bargains to be found in MD lenses - some of the faster ones are still fetching good prices.
Along the way, I have acquired two 'glassed' MD adapters; however I did not go much further than checking that they worked on my a100 with three average MD lenses, that I have since sold. In my opinion, the ability to use older MD lenses on Sony DSLRs is welcomed and especially in macro/close-up work, however not for me for general shooting.
Even though ALL of the functions on the camera's that I first held in my hand were set manually, the ability to use the available technology in today's DSLRs has definitely spoilt me in this regard. Macro work however is an all together a different matter, because when you are that close to your subject manually setting up the exposure is a good thing to do, and if shooting without a tripod moving the camera can work better that trying to use the focus ring on the lens?
As commented on by others, I find one of the most challenging aspects of close-up work is establishing exactly what your subject is going to be. In regard to flowers; is it the entire flower or only a particular part of the flower? Once you have established your subject, then you can compose the shot accordingly. Flowers with lots of depth in the blossom, such as those you chose to capture, I find are more difficult to compose than those with a shallower depth in the blossom such as a daisy or a sunflower?
I also find that DOF and bokeh considerations can be challenging when selecting which aperture setting to use for close-up work. The great thing with close-up work is that your subject is usually static and that means that you can generally move it and/or yourself around.
Thanks for posting, you have encouraged me to start looking at some good MD glass and maybe one of those glassless adapters too....Please post some more with that new combo of yours....
Regards Steve
