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The magic of the EF 75-300mm

Started Jul 29, 2016 | Discussions thread
OP SteveHU89 Regular Member • Posts: 119
Re: The magic of the EF 75-300mm

RAW, untouched >>> JPEG (EF 75-300mm f/4-5.6 iii) Canon T5

Notice the smooth, dreamy background? Couldn't have achieved this with the 50-250 IS STM.
RAW, PP in PS, Camera Raw >>> JPEG (EF 75-300mm f/4-5.6 iii) Canon T5

RAW, PP in PS, Camera Raw >>> JPEG (EF 75-300mm f/4-5.6 iii) Canon T5

This is when I fell in love with this lens, and that's the magic I'm talking about. That creamy bokeh cannot be replicated with the nifty250.
RAW, PP in PS, Camera Raw >>> JPEG (EF 75-300mm f/4-5.6 iii) Canon T5

Comparison F5.6, 50-250mm (~ 250mm) notice the dark, busy and unappealing background, but the subject is SHARP.
RAW, untouched >>> JPEG (EF-s 55-250mm f/4-5.6 IS STM) Canon T5

Comparison F5.6, 75-300 (~250 mm) notice the creamy background where the background stays serene, light, but the 75-300 shows it's bad IQ without stopping down.
RAW, untouched >>> JPEG (EF 75-300mm f/4-5.6 iii ) Canon T5

Notice how the foreground slowly sneaks up towards the center of the image, drawing attention on the subject. If I made this shot with the 50-250 IS STM, then the foreground would be contrasty, busy..... the whole pic would be sharp as can be, lacking charm.
RAW, untouched, Camera Raw >>> JPEG (EF 75-300mm f/4-5.6 iii) Canon T5

Basically I can't find the terminology for what I'm looking for. Why is the bokeh so smooth and creamy? Does the e.g. 70-300 IS USM perform similarly? What are specific properties of a lens that I should look for to achieve this (electronics, blades, AF motor, coating? I'm completely clueless).
Hope this will clear things up and sorry about the mass confusion.

 SteveHU89's gear list:SteveHU89's gear list
Canon EOS 6D Canon EF 70-200mm F4L IS USM Canon EF 35mm F2 IS USM Canon EF 50mm F1.8 STM
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