We are still planning, so far we are thinking of joining a group. but we are flexible at this stage. it sounds like 200mm is long enough? I'm seriously thinking about the new 12-100mm from olympus as the only lens i take. and maybe the em5 mk2 for small and light weight. i was initially thinking the fuji kit, but i'm worried if I'm tired i might not be bothered changing lens or worse dropping one.
How many of you are going? Forming your own group with your own guide and one porter per 2 trekkers is the most convenient way of trekking, if that style of trekking suits you (some people want to carry their gear and want no guides etc, which is also fine). It is also more flexible it you have the time (should have) as you can change the itinerary on the fly. Also cheaper, as you can deal with the Nepalese trekking agencies directly, cutting the western travel agent with 40% commission from the supply chain. Get a deal which includes the transportation, permits, guiding and portering, but no food & lodgings, as then you can choose the places where to sleep and eat yourself, guide having only the advisory status, not decision making power over those matter. This is mentally surprisingly important, as experience has shown. I have been to Nepal 9 times myself, so far, and going again next year if the second hip replacement operation goes well also, hopefully.
By the way, there are several route options on the EBC trail, which 95% of trekkers miss, by just going up and down the same trails with everybody elseand not using some imagination and map reading skills. Send PM if interested.
The agency we have used to arrange our treks, varying in size from one lone porter-guide to a staff of 31 strong camping crew, also climbing expedition to Baruntse, is Iceland Trekking and Expedition,
http://www.iceland-trekking.com . They have fair and transparent pricing structure. Tell Tendy Sherpa, the owner, that mr Petri from Finland sent you.
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What comes to the lenses I did have a 300mm lens on my first trek around Annapurna and Annapurna Sanctuary in 1984, but have not had anything longer than 135mm since. Too little use, really, considering the size and weight. The first time I hiked AC with a digital camera I had Canon 5D with 24-105mm zoom, and that was just fine, even if on the heavy side. The last time I trekked in Nepal I had Nikon D800E with 24-120mm, ditto. 12-100mm would be quite ideal as an only lens. A faster WA would be nice for the monasteries and lodge interiors, though, and as a spare lens.
Pictures from 2006 Annapurna Circuit are here:
https://get.google.com/albumarchive/109958612223411682295/album/AF1QipOrYlthuJ_XyNbJ2pqHN0OKVgAQnRS8ANrzv18kPictures from 2009 trip to Manaslu, Naar-Pho, Tilicho Lake, Annapurna Sanctuary, Everest BC (52 days), here:
https://get.google.com/albumarchive/109958612223411682295/album/AF1QipM-DBd1d6e67WDzuqCJ1bIwF2nIVlOZVfdko6Lj