About my 18 - 135mm lense.

Joined: 31 May 2005 Posts: 127

Just a newbie question. I have a new 18-135mm and when I view an object at 135 mm from about 5 ft, and then use my Fuji s5000 too view the same object at the same distance, the S5000 is more zoomed in on the object i.e. the object is bigger with Fuji. Am I missing something here? I thought at 135 mm, I can focus on subjects much more closer than what I use to have.

Posted: Sun Dec 03, 2006 1:07 am

Hi Canes, the difference you’re seeing in size is not so much a result of the lens but that of the camera's sensor.
Each digital camera has what is referred to as a crop factor or focal length multiplier. What happens is that the sensor on your Fuji is smaller than the one on your D70s; this means that the sensor on your Fuji catches less of what the lens projects making the subject appear larger in the frame. Since the D70s sensor is much larger than the Fuji’s more is captured by the sensor and you need to get closer to fill the frame.
Check out this link for a clearer explanation. http://www.dpreview.com/learn/?/key=focal%20length%20multiplier

Joined: 31 May 2005 Posts: 127

Thanks Lionello. This clarifies it. But follow up question though, So when I view my photo on the computer or print it, will it appear larger? Thanks again.

Posted: Sun Dec 03, 2006 4:12 pm

The image on your computer will look the same as what the sensor has captured, so what you see in the view finder or camera LCD is the same as what you'll see on your computer.
You could how ever crop the image closer with software to within certain pixel limits to further enlarge, if that’s what you want.

Joined: 31 May 2005 Posts: 127

Thanks.