EHRD / Rotterdam

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Melmac
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EHRD / Rotterdam

Post by Melmac »

Testing a possible new lens, I dont think it will be this one.
All unsharp to my opinion. Please share your views

HB-JRV, 1988, Canadair CL-600-2B16 Challenger 601-3A C/N 5035;
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PH-HZG, Boeing 737-8K2, C/N 28379
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PH-XRV, Boeing 737-7k2, C/N 34170
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What goes up..........Must come down for maintenance
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Burry
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Re: EHRD / Rotterdam

Post by Burry »

Perhaps good to give some background on the equipment you used?
I'm not an expert, but perhaps someone could give you feedback?
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ChrisGlobe
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Re: EHRD / Rotterdam

Post by ChrisGlobe »

Sadly Photobucket has compressed the images to the point at which it's impossible to tell. :(

Try uploading one to abload.de and posting it here?
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Melmac
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Re: EHRD / Rotterdam

Post by Melmac »

Hi Guys,

Thanks for the replies.
Equipment used;
Body; Sony Alpha 350
Lens; Cosina 100-400mm 1 : 4.5 - 6.7

I'll try to upload via another site later.
What goes up..........Must come down for maintenance
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Snipes
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Re: EHRD / Rotterdam

Post by Snipes »

I found this review on internet:

"Pros:Sharp at 135 to 300, Cheap, Light weight
Cons:Low build quality, very soft at 400 at any aperture, pump zoom too loose
The Bottom Line: $200 is too expensive for the quality. A good buy for 100-300 f/4.5-5.6 lens at $150 (new) or $75 (used). Stay away if you want a real 400mm.


Vivitar, Cosina, and Phoenix are all actually the same.
It is the cheapest zoom of 100-400mm focal length I can find in the market. Especially since I got a mint used one at $80. Summarily the quality is below par, but at this price, I would say it's a good deal.
It is a push-pull type of zoom, sometimes called a pump-zoom.

SHARPNESS:
Not too bad at 100mm stopped down, surprisingly sharp from 135mm to about 300mm (especially at f/8 to f/16). From 300mm to 400mm it gets soft very quicken and very soft at 400 end at any aperture. I would say it's about as sharp as Canon EF 100-300 5.6L (not the 4.0-5.6L) from 135 to 300.

CONTRAST:
Not very good. I almost always have to boost the contrast in Photoshop. Lots of light will help.

FLARE:
Terrible. One of the worst that I have used. A good hood may help but I haven't tried.

BUILD QUALITY:
Not very good. At the maximum zoom, the front element seems to be shaking a little bit, results in very soft image at 400mm even on a good tripod. It seems that winds or flipping mirror on the camera while taking the shot will cause the front element to vibrate a bit.

The zoom is also too loose, it means that the zoom will move when you tilt the lens up or down, even in a small angle.
Manual focusing is not full-time, you will have to manually switch from AF to MF.
Autofocus is acceptably quick. I would say it's about par with Canon EF 75-300 USM. From minimum distance to infinity, it takes about 2 seconds.

VALUE FOR MONEY:
Certainly not a good value for money at $200. Only buy it if you can find a used one in good condition at less than $90.

BOTTOMLINE:
A decent 100-300 F4.5-5.6 Lens, 400 is barely usable unless you print only at 4x6 or 5x7 at most."
Greetz Wesly
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