Whichever I choose, this will be my first CCD camera. I'm really leaning towards the 420 because it's so affordable, and not being experienced, I would like to avoid spending thousands of dollars to find out that I like DSLR better. But at the same time, I'm one that understands *value* and I'm willing to pay more for higher quality.
That being said, is the 428EX so far advanced from the 420 that it's not worth the savings to purchase a 420? I'd love to save money on the ccd purchase to spend on a FW and filters, but at the same time, I don't want to regret saving money and wish I bought the 428.
FYI -- my gear is an Orion ED80T CF on a CGEM, and my primary interest with imaging is narrowband nebula. I've checked the FOV with both the 428 and 420, and I'm happy with both. The 420 FOV is narrower, but I would save enough to purchase a 0.8x reducer/flattener and get a similar FOV to the 428 without the 0.8x.
Any thoughts?