Canon Lens Magnification Value

 
What is the magnification value of a camera lens?
 
When you buy binoculars, you make your purchase decision partly based on their magnification - such as 7x or 10x. How does this equate with camera lenses?
 
When you buy a consumer digicam or a video camera, you usually see the included zoom lens advertised as 5x, 10x ... But wait - this is not the same value. This ?x value is the zoom range factor.
 
For example, the Canon EF-S 17-85mm IS USM Lens has a 5x zoom range. Divide 85mm by 17mm to get the zoom range of 5x. The Canon EF 28-300mm IS Lens has a zoom range of 10.7x.
 
To get the binocular-like viewfinder magnification value of a lens, divide the focal length by 50.
 
A formula that is easier (for me at least) to calculate in my head is to divide the focal length by 100 and multiply by 2. Just move the decimal point two places to the left and multiply by 2.
 
Here is an example: For a 300mm lens, divide 300 by 50 to get 6x magnification.
 
Or divide 300 by 100 to get 3, then multiply 3 x 2 to get 6x.
 
Another example: For a 100mm lens, divide 100mm by 100 to get 1. Multiply 1 x 2 to get 2x magnification.
 
Keep in mind that viewfinder magnification varies across Canon's EOS line (for example: .72x in the Canon EOS 1D Mark II Digital SLR, .7x in the Canon EOS 1Ds Mark II Digital SLR, .9x in the Canon EOS 20D Digital SLR and .8x in the Canon EOS 350D Digital Rebel XT SLR/ Canon EOS 300D Digital Rebel SLR) and must be taken into account as the subject size in the viewfinder is affected. The viewfinder magnification does not affect the final image (the FOVCF of course does affect the final image framing).
 
Please note: This is just a simple, approximate subject magnification amount in the viewfinder.
 
I am not referring to the size of the subject relative to the size of the subject on the sensor. This is generally reported as the lens magnification spec and is often reported as .14x, .29x ... It is also reported as 1:4 (final image size on the sensor is 1/4 as large as the subject), 1:1 (subject is life-size on the sensor) ...
 
I am also not taking about the pixel density of the sensor. A higher pixel density sensor will (all other qualities being equal) result in more detail available for enlarging (or viewing on a monitor) a specific subject in part of the photo.
 
I am also not referring to output (display, printer, ...) size or density. Any picture can be printed or displayed at any size. For example, a 1:1 life-size macro picture will appear far larger than life-size when displayed on a 19" LCD monitor at 100% pixel size due to the relatively large size of LCD pixels. Of course, the amount and quality of pixels available for printing/viewing make a big difference in the results.
 
Make sense?

 
 

 

 

 

* Canon EOS 1D X Digital SLR Review
Canon EOS 1Ds Mark III Digital SLR Review
Canon EOS 1D Mark IV Digital SLR Review
Canon EOS 5D Mark III Digital SLR Review
Canon EOS 5D Mark II Digital SLR Review
Canon EOS 7D Digital SLR Review
Canon EOS 60D Digital SLR Review
Canon EOS Rebel T3i / 600D Digital SLR Review
Canon EOS Rebel T2i / 550D Digital SLR Review
Canon EOS Rebel T3 / 1100D Digital SLR Review
* Canon PowerShot G1 X Digital Camera Review
more Canon Digital SLR Camera Reviews ...
 
Canon EF 8-15mm f/4 L USM Fisheye Lens Review
Canon EF 16-35mm f/2.8 L II USM Lens Review
Canon EF 17-40mm f/4.0 L USM Lens Review
* Canon EF 24-70mm f/2.8 L II USM Lens Review
Canon EF 24-70mm f/2.8 L USM Lens Review
Canon EF 24-105mm f/4.0 L IS USM Lens Review
Canon EF 28-135mm f/3.5-5.6 IS USM Lens Review
Canon EF 28-300mm f/3.5-5.6 L IS USM Lens Review
Canon EF 70-200mm f/4.0 L USM Lens Review
Canon EF 70-200mm f/4.0 L IS USM Lens Review
Canon EF 70-200mm f/2.8 L USM Lens Review
Canon EF 70-200mm f/2.8 L IS II USM Lens Review
Canon EF 70-300mm f/4-5.6 L IS USM Lens Review
Canon EF 70-300mm f/4.0-5.6 IS USM Lens Review
Canon EF 70-300mm f/4.5-5.6 DO IS USM Lens Review
Canon EF 75-300mm f/4.0-5.6 III USM Lens Review
Canon EF 100-400mm f/4.5-5.6 L IS USM Lens Review
* Canon EF 200-400mm f/4 L IS USM Extender 1.4x Lens
Review
more Canon Zoom Lens Reviews ...
 
Canon EF 14mm f/2.8 L II USM Lens Review
Canon EF 15mm f/2.8 Fisheye Lens Review
Canon TS-E 17mm f/4 L Tilt-Shift Lens Review
Canon EF 20mm f/2.8 USM Lens Review
Canon EF 24mm f/1.4 L II USM Lens Review
* Canon EF 24mm f/2.8 IS USM Lens Review
Canon EF 24mm f/2.8 Lens Review
Canon TS-E 24mm f/3.5 L II Tilt-Shift Lens Review
Canon EF 28mm f/1.8 USM Lens Review
* Canon EF 28mm f/2.8 IS USM Lens Review
Canon EF 28mm f/2.8 Lens Review
Canon EF 35mm f/1.4 L USM Lens Review
Canon EF 35mm f/2.0 Lens Review
Canon TS-E 45mm f/2.8 Tilt-Shift Lens Review
Canon EF 50mm f/1.2 L USM Lens Review
Canon EF 50mm f/1.4 USM Lens Review
Canon EF 50mm f/1.8 II Lens Review
Canon EF 50mm f/2.5 Macro Lens Review
Canon MP-E 65mm 1-5x Macro Lens Review
Canon EF 85mm f/1.2 L II USM Lens Review
Canon EF 85mm f/1.8 USM Lens Review
Canon TS-E 90mm f/2.8 Tilt-Shift Lens Review
Canon EF 100mm f/2.0 USM Lens Review
Canon EF 100mm f/2.8 USM Macro Lens Review
Canon EF 100mm f/2.8 L IS USM Macro Lens Review
Canon EF 135mm f/2.0 L USM Lens Review
Canon EF 135mm f/2.8 With Soft Focus Lens Review
Canon EF 180mm f/3.5 L USM Macro Lens Review
Canon EF 200mm f/2.8 L II USM Lens Review
Canon EF 200mm f/2.0 L IS USM Lens Review
Canon EF 300mm f/4.0 L IS USM Lens Review
Canon EF 300mm f/2.8 L IS II USM Lens Review
Canon EF 400mm f/5.6 L USM Lens Review
Canon EF 400mm f/4.0 DO IS USM Lens Review
Canon EF 400mm f/2.8 L IS II USM Lens Review
* Canon EF 500mm f/4.0 L IS II USM Lens Review
Canon EF 500mm f/4.0 L IS USM Lens Review
* Canon EF 600mm f/4.0 L IS II USM Lens Review
Canon EF 600mm f/4.0 L IS USM Lens Review
Canon EF 800mm f/5.6 L IS USM Lens Review
Canon Extender EF 1.4x III Review
Canon Extender EF 2x III Review
more Canon Lens Reviews ...
 
Canon EF-S 10-22mm f/3.5-4.5 USM Lens Review
Canon EF-S 15-85mm f/3.5-5.6 IS USM Lens
Canon EF-S 17-55mm f/2.8 IS USM Lens Review
Canon EF-S 17-85mm f/4-5.6 IS USM Lens Review
Canon EF-S 18-55mm f/3.5-5.6 IS II Lens Review
Canon EF-S 18-135mm f/3.5-5.6 IS Lens Review
Canon EF-S 18-200mm f/3.5-5.6 IS Lens Review
Canon EF-S 55-250mm f/4-5.6 IS Lens Review
Canon EF-S 60mm f/2.8 Macro USM Lens Review
more Canon EF-S Lens Reviews ...

Sigma 8-16mm f/4.5-5.6 DC HSM Lens Review
Sigma 10-20mm f/3.5 EX DC HSM Lens Review
Sigma 10-20mm f/4-5.6 EX DC HSM Lens Review
Sigma 17-50mm f/2.8 EX DC OS HSM Lens Review
Sigma 17-70mm f/2.8-4 DC Macro OS Lens Review
Sigma 18-250mm f/3.5-6.3 DC OS HSM IF Lens Review
Sigma 20mm F/1.8 EX DG Lens Review
Sigma 30mm f/1.4 EX DC HSM Lens Review
Sigma 50mm f/1.4 EX DG HSM Lens Review
Sigma 85mm f/1.4 EX DG HSM Lens Review
more Sigma Lens Reviews ...
 
 
Tamron 10-24mm f/3.5-4.5 Di II Lens Review
Tamron 17-50mm f/2.8 XR Di II Lens Review
* Tamron 17-50mm f/2.8 XR Di II VC Lens Review
Tamron 18-270mm f/3.5-6.3 Di II VC Lens Review
Tamron 28-75mm F/2.8 XR Di Lens Review
Tamron 70-200mm f/2.8 Di Macro Lens Review
Tamron 70-300mm f/4-5.6 Di VC Lens Review
Tamron 90mm f/2.8 Di Macro Lens Review
more Tamron Lens Reviews ...
 
 
Tokina 11-16mm f/2.8 AT-X Pro DX Lens Review
 
 
Zeiss 18mm f/3.5 Distagon T* ZE Lens Review
Zeiss 21mm f/2.8 Distagon T* ZE Lens Review
Zeiss 35mm f/1.4 Distagon T* ZE Lens Review
Zeiss 35mm f/2.0 Distagon T* ZE Lens Review
Zeiss 85mm f/1.4 ZE Planar T* Lens Review
Zeiss 100mm f/2.0 Makro-Planar T* ZE Lens Review
 
 
  (standardized results only at this time)  
 
   
* Canon Speedlite 600EX-RT Flash Review
Canon Speedlite 580EX II Flash Review
Canon Speedlite 430EX II Flash Review
Canon Speedlite 320EX Flash Review
Canon Speedlite 270EX II Flash Review
* Canon Speedlite Transmitter ST-E3-RT Review
Canon Speedlite Transmitter ST-E2 Review
more Flash & Lighting Accessory Reviews ...
 
Tripod, Monopod, Ballhead & Accessory Reviews
UV, Circular Polarizer & Other Filter Reviews
Camera & Lens Accessory Reviews
Lens & Sensor Cleaning Supplies Reviews
Camera Bag, Backpack & Lens Case Reviews
What I Use: Digital Cameras and Lenses
What I Use: Photography Accessories
 
* Text portion of this review is not complete

 
Introduction - Canon lens choosing is confusing!
What Focal Length(s) Do You Need?
What Maximum Aperture Do You Need?
Canon General Purpose Lens Recommendations
Canon Portrait Lens Recommendations
Canon Wedding Lens Recommendations
Canon Outdoor Sports Lens Recommendations
Canon Indoor Sports Lens Recommendations
Canon Macro Lens Recommendations
Canon Wildlife Lens Recommendations
Canon Landscape Lens Recommendations
 
ISO 12233 Resolution Chart Sample Crop Comparison
Vignetting Test Results Comparison
Lens Flare Comparison
Lens Distortion Comparison
Lens Specifications and Measurements Comparison
Lens Product Image Comparison
 
Used Canon Cameras and Lenses
Where To Buy Used Canon Cameras and Lenses
Where To Buy Canon Cameras and Lenses
Field of View Crop Factor (Focal Length Multiplier)
Canon L Lens Series
USA vs. Gray Market/Imported Canon Lenses - the difference?
Zoom vs. Fixed Focal Length (Prime) Lenses
Canon Lens Date Codes - How old is that lens?
Canon Lens Vignetting (Light Fall-off)
Lens Hoods - Do I really need to use one?
Canon Lens Rebates
UV Filters - Should they be used?
 
Canon Digital SLR Camera Sample Pictures
Canon Zoom Lens Sample Pictures
Canon Lens Sample Pictures
Canon EF-S Lens Sample Pictures
Sigma Lens Sample Pictures
Tamron Lens Sample Pictures
Tokina Lens Sample Pictures
Zeiss Lens Sample Pictures
Flash & Lighting Accessory Sample Pictures
Filter Sample Pictures
Best of the Site Pictures
Sensor Cleaning
Watch the Background!
Exposure Basics
Digital Workflow - Using Canon Digital Photo Professional
Fireworks Photography Tips
Photography Equipment & Liability Insurance
Packing for a Landscape Photography Trip
Counterfeit Camera Accessories Warning
Camera & Lens Focus Calibration Testing
How To Use a Gray Card
Circular Polarizing Filters Can Make A Huge Difference
How to Remove a Stuck Lens Filter
Air Show Pictures & Photography Tips
More Photography Tips ...

 

 

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