Go Back   Steve's Digicams Forums > Digicam Help > General Discussion

Reply
 
Thread Tools Search this Thread
Old Nov 25, 2018, 1:50 PM   #1
Junior Member
 
Join Date: Nov 2018
Posts: 2
Default Sigma 18-300mm lens doesn't zoom as close as Canon 55-250mm lens

I just bought a Sigma 18-300mm lens for my Canon SL2 so I don't have to constantly switch back and forth between my Canon 18-55mm and 55-250mm lenses. However, I quickly discovered that the Sigma lens zoomed to 300mm doesn't magnify anywhere close as much as the Cannon lens zoomed to just 250mm. Can someone explain what's going on? And is there a reasonably priced lens out there that can actually replace those two Canon lenses?

Last edited by ksu93; Nov 25, 2018 at 1:57 PM.
ksu93 is offline   Reply With Quote
Sponsored Links
Old Nov 25, 2018, 3:52 PM   #2
Senior Member
 
Join Date: Jan 2011
Location: Australia, New South Wales central coast
Posts: 3,168
Default

G'day KSU

Firstly - as this is your first post here ... welcome to the forum, I do hope that you will also offer us some of your images to view and show us the sort of photography that you enjoy

Secondly - to my knowledge there is no Canon 55-250 lens ... it is the 55-200, and

Thirdly - the Sigma 18-300 does focus close up - it comes in to 0.4m / 16" ... so where is the issue with " the Sigma lens zoomed to 300mm doesn't magnify anywhere close as much as the Cannon lens "

A little more information from you would make a big difference
Phil
__________________
Has Lumix mirrorless & superzoom cameras and loves their amazing capabilities
Spends 8-9 months each year travelling Australia
Recent images at http://www.flickr.com/photos/ozzie_traveller/sets/
Ozzie_Traveller is offline   Reply With Quote
Old Nov 25, 2018, 4:22 PM   #3
Junior Member
 
Join Date: Nov 2018
Posts: 2
Default Images

I double checked, and it is definitely a Canon 55-250mm lens. I've had it for about eight years. Here are the sample photos I took. The first one (with greater magnification) is the Canon lens zoomed all the way to 250mm. The second one (with less magnification) is the Sigma lens zoomed all the way to 300mm. I took the pictures just moments apart from the same distance and using the same camera.



ksu93 is offline   Reply With Quote
Old Nov 25, 2018, 5:01 PM   #4
Senior Member
 
TCav's Avatar
 
Join Date: Sep 2005
Location: Washington, DC, Metro Area, Maryland
Posts: 13,696
Default

Sometimes the focal length of a lens, especially a zoom lens, will change with the focus distance. There isn't much you can do about it.


As an aside, jack-of-all-trades-and-master-of-none lenses like the Sigma 18-300 try to do a lot and don't do anything particularly well. You'll usually get better image quality from multiple lenses of less ambitious zoom ranges.
__________________
  • The lens is the thing.
  • 'Full Frame' is the new 'Medium Format'.
  • "One good test is worth a thousand expert opinions." - Tex Johnston, Boeing 707 test pilot.
TCav is offline   Reply With Quote
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 3:52 AM.