Which eyepiece is the best to see the ISS?

[StarGazer45]

First of all, I'm very busy right now so I'm not posting much stuff here or on my astronomy blog.

There's going to be a nice ISS pass in about 30 minutes here and I'm using a 76/350 reflector telescope and an iPhone 6 to capture it. Should I use a 20mm or a 4mm eyepiece? I mean, it's easier with the 20mm but I reckon I can get much better views with the 4mm eyepiece. I also have a x2 Barlow lens, so maybe I can combine one of the two... Can anyone help me?

[Lady Fraktor]

The 20mm (assuming Plossl since you do not say) will give you a TFOV of 2.77° and the 4mm 0.57°
It will be much easier to find and track with the 20mm if you are using the mount listed in your signature.

[StarGazer45]

The 20mm (assuming Plossl since you do not say) will give you a TFOV of 2.77° and the 4mm 0.57°
It will be much easier to find and track with the 20mm if you are using the mount listed in your signature.

Yes, it's a Plössl. Thanks!

[Lady Fraktor]

If you are thinking of using your 2x barlow as well then remember to reduce the TFOV by 50%