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Crope mode on A7ii


Mode101
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How does the crope mode works on A7's using crop lens? For example a crop 50mm is it the equavalent of 50mm on Apsc? I heard the megapixel (20megapixels on FF becomes 10megapixel crop mode) are cut in half?

A6000 user here and I'm gonna buy a A7II soon, I plan to use my crop lenses on the A7 'til I get FE lenses.

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50mm full frame is still 50mm in apsc. In apsc mode it just behaves like a 75mm in full frame with same aperture (same field of view and depth of field).

 

When you are cropping you need to count both horzontal and vertical pixels separately. 24 Mp is 4000 x 6000 pixels. if you apply 1.5 crop, it becomes 2667 x 4000 = 9 Mp.

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Crop mode (APSC Mode) works flawlessly.  Sony A7II has a setting to auto detect APSC lens and you get the same field of view as you would on your a6000.  On a full frame lens, you can also set the Sony A7II to "crop mode" and get the extra reach you would with your a6000.  I haven't checked the megapixel difference between the two, but expect it to be the same megapixels as you get with your a6000.

 

Other (not all) Full Frame cameras have this feature as well, its having the advantages of both APSC and Full Frame sensors in one.   :)

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50mm full frame is still 50mm in apsc. In apsc mode it just behaves like a 75mm in full frame with same aperture (same field of view and depth of field).

 

When you are cropping you need to count both horzontal and vertical pixels separately. 24 Mp is 4000 x 6000 pixels. if you apply 1.5 crop, it becomes 2667 x 4000 = 9 Mp.

I stand corrected. I do not know what I was calculating before, 2667 x 4000 = 10.67 megapixels

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    • Hmm that's pretty dreadful indeed... My 18-105 for sure is sharper than that. If I have time tomorrow I'll shoot an example with mine at 40mm f/8 side by side with the 16-55. Sold my kit lens when I bought the 18-105 so can't compare those anymore.
    • Thanks for the very useful information. The 16-55 tempts me, I can live with the absence of stabilisation, what holds me is the price tag. As always, there is not such a thing like a free lunch in life. The Sony gives performance at a reasonable size but with no stabilisation and higher price tag, the Zeiss is compact, stabilised and reasonably priced but lower performed, while the Tamron provides performance at very good price and stabilisation at the expense of bulkiness. 😀 All in all, I think I will give a try to the Tamron, once I have taken in my hands. Here are two cutouts taken close to the center of the picture. The sharper one is the kit zoom, the other is the 18-105 mm, at approximately the same lenght around 40 mm at /f 8. The difference is impressive and more impressive for me is that all the lenses in the shop had the same behaviour on two different cameras. At this point looks like a whole batch and not just a lens.  

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    • That's a pity and certainly doesn't match with my experience with the 18-105: mine is definately on par with the 16-50 kit lens (which on its own was as decent as I could expect from such a cheap lens). Sure, dont expect sharp corners especially wide open, but in the center my 18-105 left little to be desired across most of the zoom range. The 16-55 does beat it in every regard except zoom range though. The Tamron 17-70 trades blows with the 16-55 and might be the better choice in some cases. I went for the 16-55 because of the smaller size (I also found the 18-105 too bulky most of the time) and slightly wider FoV. My camera has a stabilized sensor so stabilized optics was no requirement for me. As you noted, I kept the 18-105 on my old A6000 for the occasional video project.
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