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Okay. Probably best on Ken's mount then for now. You can try the Eta Carina nebula. There's a few nice clusters near it like NGC3532. Omega Centauri and nearby galaxy Centaurus A photograph well with an achro. You don't want anything with too many bright stars in the field as the achro will make a mess of it. Most globular clusters will image well, open clusters not so much. You could try M22, M4, the Tarantula neb in the LMC. If you want to hunt galaxies in the northern sky there's the Leo Triplet M65, M66 and NGC3628. The Leo Triplet is nice in a fast achro. You could try M104 in Virgo but the stars around it get a bit riddled with CA, or point the scope at M86 and see how many galaxies you can get. M16 and M17 should be okay, M8 and M20 might be a CA ridden but could be of interest just the same.
That should get you started. Remember to avoid objects with bright stars otherwise the dreaded blue halo of CA will haunt you.
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