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Old Jun 27, 2007, 11:15 AM   #1
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Dear all, i am using a 100-400 and would like to go for a 2x teleconverter. Has anyone used the same on the same set of lens, please do give your feed back.

Thanks n awaiting your replies,



jimmy


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Old Jun 27, 2007, 1:08 PM   #2
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I have and usetwo quality same-brand-matched teleconverters (Sigma). Yes they work.

But you loose sharpness and "brightness" and if you are using auto focus will probably lose that, also. Canon's own 1.4x with a 70-200 f2.8 IS lens works quite well, but their 2x with that lens is barely acceptable IMHO.

While they have their place and uses, teleconverters often severely disappoint their users who expect them to work well, in all circumstances, and with tack sharpness.


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Old Aug 15, 2007, 11:33 PM   #3
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sinners wrote:
Quote:
Dear all, i am using a 100-400 and would like to go for a 2x teleconverter. Has anyone used the same on the same set of lens, please do give your feed back.

Thanks n awaiting your replies,



jimmy

The Raynox DCr22020 is a fantastic lens if you know how to steer away from the weaknesses. The lens requires a lot of light. No you cannot make up for poor light by raising the ISO. Optical image stabilization will not produce optimum results you need a tripod if you want a razor sharp image.



Bad Shot


Panasonic FZ10
889m 11.2x DCR2020 PRO, Aperture: f/5.6
ISO: 400
Focal Length: 67.3mm (404mm 35mm)
Exposure Time: 0.0012s (10/8000)
Distance to license plate 63.5 feet.


Good shot


Panasonic Fz10
950mm 12X DCR2020 Pro, Aperture: f/4.6
ISO: 50
Focal Length: 72mm (432mm 35mm)
Exposure Time: 0.008s (10/1250)
Distance to license plate 63.5 feet

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