Insert Lens Pun Here

 
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Dr. SexBot
Doctorb


Joined: 09 Jan 2004
Posts: 953
Location: Johnstown

PostPosted: Sat Oct 06, 2018 6:25 am    Post subject: Insert Lens Pun Here Reply with quote

Because of my upcoming trips to the Grand Canyon and Sebring, I'm thinking about getting a new lens for my camera. It came with this kit lens I don't know a lot about lenses, but these options seem like they might be a good upgrade that would give me more zoom. I've seen some stuff comparing the kit with the 18-135mm but not as much of a comparison with the 18-200. I like the idea of greater zoom for the 200, but it would be bulkier. I see the aperture numbers are different too but I'm not sure if that's just a function of the one lens zooming in further and if those numbers are good or bad. Here's the 2 I am looking at. I'm not necessarily buying them on Amazon (or at all) but that's where I have the links stashed to compare.

Sony 18-135mm F3.5-5.6 OSS APS-C E-mount Zoom Lens

Sony 18-200mm F3.5-6.3 E-Mount Lens

If anyone has any opinions on these (I'm looking at you John) feel free to chime in. Even just general insight is appreciated. Don't feel like you have to do deep research on my behalf. I'm still looking into it. Also if anyone knows of a reliable place to buy camera equipment, that would be appreciated as well.
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Raptor
Sprints McGee


Joined: 04 Jan 2004
Posts: 5565
Location: The Wired

PostPosted: Sat Oct 06, 2018 4:25 pm    Post subject: Reply with quote

So the F numbers listed with the lens is the minimum at min/max zoom.
ie. The 18-200 can use F3.5 at 18mm, but can only go down to F5.6 at 200mm.

Really good lenses can maintain a consistent F-stop through the zoom range, but many are like these lenses; there nothing wrong with it if you understand the limitation.


I don't remember what camera you have, but I'm going to use the A6000 for this. Sadly they don't have the 18-135 to the comparison.

https://www.dxomark.com/Lenses/Compare/Side-by-side/Sony-E16-50mm-F35-56-on-Sony-A6000-versus-Sony-E-18-200mm-F35-63-LE-on-Sony-A6000-versus-Sony-FE-70-200mm-F4-G-OSS-on-Sony-A6000__1082_942_1085_942_1246_942

Those scores look low, but one of my best lenses on my old camera only gets a 10 in sharpness. A newer body can bump it up to 25, so both come into play.


My goto for buying gear was usually B&H photo. They're in NY so the free shipping was usually pretty too.
https://www.bhphotovideo.com/

Adorama was good too. https://www.adorama.com/

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