There is a project for this back in about 2000 that I signed up for as a potential tester. However the project never progressed. The prototype was a FF sensor that actually went where the film did and the equilivent of the film spool housed the electronics, processing engin (JPG only) and a USB port.

Looked like a great idea at the time, think it was about a 2MP sensor!

I have just had an idea!

I could take my film camera! They won't understand what it is!

Or, I can take my DSLR camera with my 35mm lens attached and my 18-135 lens with my Kelco telescope adaptor attached and say its my telescope because I have very poor eyesight!

What about the controller? I can do a little programming so the processing engin could be up an runing in a few months (unless I am arrested trying to get into Wimbledon with my non-pro, 'that looks like a pro camera Sir.' camera!)

Now, all we need is a good quality USB cable to attach my smart phone as the new 'DigiPRIME' processor.

Step 1:

I did some woodwork at school!

How about a new rotery shutter, a bit like a fan, it will have 3 functions - a sensor cleanor (blow the dust off), a sensor cooler and a twin leaf shutter!

I am going to tennis tomorrow, looks like I will be up past midnight on this one, if there is no official clarification, then I will take the 135 and pass it if as a 35mm! Doubt security will have a clue!

I think the pros are running scared that amateurs will produce better images!

At least my tennis playing 8year old has the I10! So he will be able to prove he was there when he inherits the Olympic tax bill!

Step 1: study paintent law;
Step 2: give up and buy a company who already holds the paintents required;
Step 3: give up and buy a company that produces sensors;
Step 4: outsource manufacturing to a camera company who will outsource manufacturing to a manufacturing company who will steal your design and make it cheaper.

Thanks for the clarification, however does the lens extend in length as you zoom, or is it like the 50-135 in design? Remember it is the length of the lens plus the camera body.

I suspect that they may be using x-ray machines for bags (they internationaltionel flight style security) and you will have to put your camera in a try I expect. That's what I'm imaging anyway.

I just hope I am not behindg behing someone videoing on an iPad!

You won't be allowed in with the 60-250! The restriction is lens + camera (don't even think about the lens hood!) must be 30cm or less long.

I would seriously think about the Pentax 55-300, I can measure combination with my K7 later if you need to know how big this would be.

However, I am thinking differently as I will be taking my 18-135 and possibly a 1.5x converter to the tennis - mostly this is due to the need for fast focus which the 18-135 is very capable of. Also if I need something closer then croping will be my option with cubic enlargement in Paintshop! This will also favour the sweet spot on the 18-135!

I have the older Sigma 120-400 HSM (i.e. no OS). It seems to focus rather well, however most lense become manual focus with even a 1.5x converter as the AF sensor generally stops working at somewhere between f5.6 and f6.3 (at lease on my K7). The only lens I have that seems consistent with my Kenco 1.5x converter in the Pentas 18-135 lens. Even my A*s cant keep up.

Yep, box it up, send it back before any more damage is done!