A fast, sharp zoom lens that doesn't break the bank?

Kayaker-J · 07-28-2014, 06:22 AM

@fgaudet... Thanks, and I do follow you regarding the "far from scientific" rendering test. I have been thinking about what would constitute a fast and practical lens testing protocol for my accumulation of glass. I have face-offs to do in some cases; multiple copies of the same lens to pick from in others. Finding some one thing that can target a "tipping point" characteristic of any lens under test -- a kind of litmus test -- makes a lot of sense. That is, when you know from experience it correlates well with field or in-studio performance; or, as you say, something like skin tones.

I think I can infer one or two things about the dog hair / CA test ^pp. However, you can probably tell I'm a detail guy and ever curious...

fgaudet · 07-28-2014, 07:02 AM

Originally posted by Kayaker-J

However, you can probably tell I'm a detail guy and ever curious...

Haha, my dog has a very contrasting white on black double coat. Not only does it protects the dog from the elements and cover most of my floor, clothes and furniture, I found that it also functions as an efficient CA generator. I always thought that real life testing is more representative than laboratory tests. So now I always have one high contrast target following me around.

Kayaker-J · 07-28-2014, 07:14 AM

Originally posted by fgaudet

Haha, my dog has a very contrasting white on black double coat. Not only does it protects the dog from the elements and cover most of my floor, clothes and furniture, I found that it also functions as an efficient CA generator. I always thought that real life testing is more representative than laboratory tests. So now I always have one high contrast target following me around.

Oh, that's a great test... and so artistic, too. I could use an assistant...

AldaCZ · 08-31-2014, 10:32 AM

Originally posted by Kayaker-J

Oh, that's a great test... and so artistic, too. I could use an assistant...

I use a cat for this

And it works!

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07-28-2014, 06:22 AM	#16
Kayaker-J Veteran Member Join Date: Dec 2013 Location: N.E. Ohio Posts: 535	@fgaudet... Thanks, and I do follow you regarding the "far from scientific" rendering test. I have been thinking about what would constitute a fast and practical lens testing protocol for my accumulation of glass. I have face-offs to do in some cases; multiple copies of the same lens to pick from in others. Finding some one thing that can target a "tipping point" characteristic of any lens under test -- a kind of litmus test -- makes a lot of sense. That is, when you know from experience it correlates well with field or in-studio performance; or, as you say, something like skin tones. I think I can infer one or two things about the dog hair / CA test ^pp. However, you can probably tell I'm a detail guy and ever curious...

07-28-2014, 07:02 AM	#17
fgaudet Veteran Member Join Date: Oct 2013 Location: Ontario Posts: 726	Originally posted by Kayaker-J However, you can probably tell I'm a detail guy and ever curious... Haha, my dog has a very contrasting white on black double coat. Not only does it protects the dog from the elements and cover most of my floor, clothes and furniture, I found that it also functions as an efficient CA generator. I always thought that real life testing is more representative than laboratory tests. So now I always have one high contrast target following me around.

07-28-2014, 07:14 AM	#18
Kayaker-J Veteran Member Join Date: Dec 2013 Location: N.E. Ohio Posts: 535	Originally posted by fgaudet Haha, my dog has a very contrasting white on black double coat. Not only does it protects the dog from the elements and cover most of my floor, clothes and furniture, I found that it also functions as an efficient CA generator. I always thought that real life testing is more representative than laboratory tests. So now I always have one high contrast target following me around. Oh, that's a great test... and so artistic, too. I could use an assistant...

08-31-2014, 10:32 AM	#19
AldaCZ Veteran Member Join Date: Nov 2013 Location: North Bohemia Photos: Gallery Posts: 1,251	Originally posted by Kayaker-J Oh, that's a great test... and so artistic, too. I could use an assistant... I use a cat for this And it works!