55 vs 45 mm lens

[utkinpol]

Thanks Brian, I already found this info.

It looks pretty nice on paper. What looks even nicer is this lens`s price on www.hotbuyselectronics.com - $849. I just was curious about the real difference in image quality - but if there is no noticeable difference at all I`ll definitely go with this lens and with Arsat 30 for fish-eye. I just don’t see how 10mm difference in focal range may cost $580 (considering that resulting image quality will be the same).
2 additional steps behind from the subject matter does not cost that much, at least it is so for me…

 

[utkinpol]

Wojo, you`re just reading my mind!

I was thinking about the same thing. 2CR5 has 1.3 AH - so anything above this will be OK.

I`m thinking about something like this:
http://www.batterycountry.com/ShopSite/6-volt-sla.html

I was thinking about this item - 840110 - 6 volt, 3.2 AH SLA, just becouse of its slim body shape.

I looked at the wires in the COntax 645 battery grid - it definetely cannot consume more than 100mA-200mA from battery - wires are very thin, just like regular computer wires you put over the circuit.

 

[utkinpol]

Just an update - this is the site:
http://www.portablepower.com/Productpage.asp?ProductNum=35S215S1

It has both batteries and chargers.

 

[frankgao]

Has anyone used rechargeable batteries from this company (http://www.2cr5.co.uk/start_about2cr5.html)?

How long can a charge last when used with the C645?

Any input will be appreciated.

 

[kaare]

> I recon there is very little difference in Image quality between the 45 mm and 55 mm CZ Distagon's (I have only the 45 mm, of the two).

The price difference would be due to the fact, that the 45 mm is made with 9 lenses and it is a F 2,8 lens, making it bigger with larger glass surfaces to polish, assemble and adjust, and hence more costly to produce. Also correcting a 45 mm wideangle lens of this speed to the standars CZ would require, might call for more exotic - and thus more expensive glass types.

The 55 mm is made with 7 lenses, and it is "only" a F 3,5 lens - thus smaller, and with smaller glass surfaces. And probably easier to correct for the designer, very likely not calling for the most exotic glass types.

Yes, you can walk two steps back - but that will not give you that extra F stop in terms of speed, you will not have the same perspective, nor be able to obtain the same depth of field with 55 mm.

So when choosing between the two lenses you have to define how much these considerations matter to you, and whether it is worth the extra money for the 45 mm.

On thing is for sure - you can make absolutly outstanding images with both lenses.

Happy shooting!

Cheers

KÃ¥re

 

[utkinpol]

Frank,

site says: A fully charged battery will not last as long in the camera as a lithium but, with normal use, you should get a minimum of 10-15 rolls of film out of it before recharging.

I would not expect any miracles... Not to mention that SLA battery setup will be probably much cheaper.