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Owner reviews: Promaster AF 70-300 mm f/ 4.0-5.6 EDO LD Macro
It has no strengths. Not even price.
In the event you don't like this, it can't even be used as a hammer.
This lens is dreadful. I picked one up on Ebay where even the seller was apologising and offering a 100% refund if you thought it was bad. $50. I over paid. It was bad, but I never bothered with the seller. Anyone selling this obviously needed the money.
I did not buy this for it's optical qualities but rather to check on something for my business as I've never really owned a long lens, so wasn't too disappointed by it's complete lack of optical quality. To be honest, I shouldn't use the words "optical quality" in a sentence to describe this, I should simply say "it's complete lack" and be done with it.
And to call this a lens is disrespecting anything else out there. It is unbelievably bad.
You know the results will be bad by simply looking through the viewfinder. It looks bad in a 1" screen. That is a sign that all is not well. Forget pixel peeking. Forget explaining what bad optics look like to the wife - just show her!
Maybe I just had a bad copy. I doubt it.