If I remember correctly, digital cameras built for astrophotography have special liguid cooled sensors.

Actually "dredit card" was a mis-type, but on reflection it might be close to the mark.

The dredit card companies seem to be very hot on potential fraud this year, so large transactions may be queried and it's a good idea to phone them first to tell them what is going to be presented.

Yes, I think a smaller Jessops could be viable, but probably not more than 50 shops.

I don't think we need to go that far.

WEll we've stated the reasons. Apart from anything else it might need a new shutter design, and why do that when the existing shutters were fine?

I'm not so sure it's a feature that many people would want. It isn't difficult to count off the seconds!

The shutter is held open by electrical power and the longer the shutter time the more power is consumed. Bulb also consumes power and the limit of film camera batteries was usually about 8 hours becaue of this.

In a digital camera very long exposures also heats up the sensor.

Bit most of all as shutters have for a long time been designed with a 30 seciond limit this will have more to do with film and a thing called reciprocity failure.

That is, at very long exposures the normal relationship between shutter speed and aperture breaks down. If an exposure is correct at say 1 secod at f11 then you would expect an equivalent to be 2 seconds at f16, but you will find it needs to be morw like 4 seconds. An expected 30 secondexposure might be more like two minutes to expose film correctly.

So a timed very long exposure was worthless.

Lithium batteries can and do damage digital cameras and even film cameras not designed to take them. I understand that this is due to very high initial voltages.

Examples include older cameras such as the Pentax MX and ME series models, which should only use silver oxide or alkaline G13 cells and not the lithium alternatives. Also included are more modern digital cameras which were not designed for lithium. Sometimes the manuals expressly state that they should not be used.

I know the temptation is often "it can't matter" but sometimes it does.

I really really hope you mean "succour".....

I have the kit I use in a Billingham bag and the rarely used lenses are out in the open air on a shelf in a dry environment (thanks to central heating!). The worst place is tucked away in drawers and cupboards.